subject:(visual evoked potential)

1. Duncan, Chad S. Top-down Modulation of the Chromatic VEP with Hypnotic Suggestion.

Degree: 2013, University of Nevada – Reno

► AbstractVisual perception is composed of both bottom-up (stimulus driven) and top-down (feedback) processes. It has been demonstrated that directed spatial attention enhances processing of attended… (more)

▼ AbstractVisual perception is composed of both bottom-up (stimulus driven) and top-down (feedback) processes. It has been demonstrated that directed spatial attention enhances processing of attended stimuli, inhibits non-attended stimuli, and increases baseline activity in portions of cortex corresponding to attended areas of the visual scene in the absence of a stimulus. However, mechanisms of attention appear to influence processing of chromatic stimuli differently than that of achromatic stimuli. Visual evoked potentials (VEPs) recorded under such conditions agree with this pattern of activation when elicited by purely achromatic grating stimuli. However, when stimuli were chosen to preferentially activate the S-(L+M) or L-M chromatically opponent pathways, no changes in signal were detected as a function of attention, suggesting different amounts of feedback, or different mechanisms of feedback, reaching the visual cortex where the VEP is thought to originate. Hypnosis is another form of top-down manipulation that can produce significant signal change in the VEP. A set of four experiments were conducted to investigate whether or not feedback extending to lower visual areas is capable of altering processing of incoming information in the presence of hypnotic suggestion. Positive and negative suggestions were used to invoke hallucinations regarding stimulus presence and absence, as well as imagined stimulus occlusions. It was hypothesized that unlike attentional manipulations hypnotic suggestions would affect VEPs elicited by stimuli that were designed to isolate the individual opponent pathways. However, similar to results from attention VEP studies, a significant difference was obtained in the achromatic waveform but not in the chromatic waveform. These data indicate that hypnotic suggestion may feedback to lower visual areas in a manner similar to that of attentional manipulations. Advisors/Committee Members: Crognale, Michael A. (advisor), Caplovitz, Gideon P. (committee member), Webster, Michael A. (committee member), Danton, William (committee member), Nickles, Thomas J. (committee member).

Subjects/Keywords: chromatic visual evoked potential; feedback; hypnotic suggestion; hypnotism; top-down modulation; visual evoked potential (vep)

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APA (6^th Edition):

Duncan, C. S. (2013). Top-down Modulation of the Chromatic VEP with Hypnotic Suggestion. (Thesis). University of Nevada – Reno. Retrieved from http://hdl.handle.net/11714/3062

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Chicago Manual of Style (16^th Edition):

Duncan, Chad S. “Top-down Modulation of the Chromatic VEP with Hypnotic Suggestion.” 2013. Thesis, University of Nevada – Reno. Accessed March 07, 2021. http://hdl.handle.net/11714/3062.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

MLA Handbook (7^th Edition):

Duncan, Chad S. “Top-down Modulation of the Chromatic VEP with Hypnotic Suggestion.” 2013. Web. 07 Mar 2021.

Vancouver:

Duncan CS. Top-down Modulation of the Chromatic VEP with Hypnotic Suggestion. [Internet] [Thesis]. University of Nevada – Reno; 2013. [cited 2021 Mar 07]. Available from: http://hdl.handle.net/11714/3062.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Council of Science Editors:

Duncan CS. Top-down Modulation of the Chromatic VEP with Hypnotic Suggestion. [Thesis]. University of Nevada – Reno; 2013. Available from: http://hdl.handle.net/11714/3062

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

2. Szabo, Thomas G. Toward an Account of Habituation Patterns in Adolescents with High Functioning Autism.

Degree: 2013, University of Nevada – Reno

URL: http://hdl.handle.net/11714/3131

► Three experiments were conducted to examine habituation to tactile and visual stimuli in 10-15 year old boys and girls with and without high functioning autism.… (more)

Subjects/Keywords: electrooculogram; P3; preference assessment; tactile habituation; visual evoked potential; visual habituation

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APA (6^th Edition):

Szabo, T. G. (2013). Toward an Account of Habituation Patterns in Adolescents with High Functioning Autism. (Thesis). University of Nevada – Reno. Retrieved from http://hdl.handle.net/11714/3131

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Chicago Manual of Style (16^th Edition):

Szabo, Thomas G. “Toward an Account of Habituation Patterns in Adolescents with High Functioning Autism.” 2013. Thesis, University of Nevada – Reno. Accessed March 07, 2021. http://hdl.handle.net/11714/3131.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

MLA Handbook (7^th Edition):

Szabo, Thomas G. “Toward an Account of Habituation Patterns in Adolescents with High Functioning Autism.” 2013. Web. 07 Mar 2021.

Vancouver:

Szabo TG. Toward an Account of Habituation Patterns in Adolescents with High Functioning Autism. [Internet] [Thesis]. University of Nevada – Reno; 2013. [cited 2021 Mar 07]. Available from: http://hdl.handle.net/11714/3131.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Council of Science Editors:

Szabo TG. Toward an Account of Habituation Patterns in Adolescents with High Functioning Autism. [Thesis]. University of Nevada – Reno; 2013. Available from: http://hdl.handle.net/11714/3131

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Queensland University of Technology

3. Zhou, Nanyu. Cone signals and activity in myopia and emmetropia.

Degree: 2013, Queensland University of Technology

URL: https://eprints.qut.edu.au/63463/

► Myopia (short-sightedness) is a common ocular disorder of children and young adults. Studies primarily using animal models have shown that the retina controls eye growth… (more)

▼ Myopia (short-sightedness) is a common ocular disorder of children and young adults. Studies primarily using animal models have shown that the retina controls eye growth and the outer retina is likely to have a key role. One theory is that the proportion of L (long-wavelength-sensitive) and M (medium-wavelength-sensitive) cones is related to myopia development; with a high L/M cone ratio predisposing individuals to myopia. However, not all dichromats (persons with red-green colour vision deficiency) with extreme L/M cone ratios have high refractive errors. We predict that the L/M cone ratio will vary in individuals with normal trichromatic colour vision but not show a systematic difference simply due to refractive error. The aim of this study was to determine if L/M cone ratios in the central 30° are different between myopic and emmetropic young, colour normal adults. Information about L/M cone ratios was determined using the multifocal visual evoked potential (mfVEP). The mfVEP can be used to measure the response of visual cortex to different visual stimuli. The visual stimuli were generated and measurements performed using the Visual Evoked Response Imaging System (VERIS 5.1). The mfVEP was measured when the L and M cone systems were separately stimulated using the method of silent substitution. The method of silent substitution alters the output of three primary lights, each with physically different spectral distributions to control the excitation of one or more photoreceptor classes without changing the excitation of the unmodulated photoreceptor classes. The stimulus was a dartboard array subtending 30° horizontally and 30° vertically on a calibrated LCD screen. The m-sequence of the stimulus was 215-1. The N1-P1 amplitude ratio of the mfVEP was used to estimate the L/M cone ratio. Data were collected for 30 young adults (22 to 33 years of age), consisting of 10 emmetropes (+0.3±0.4 D) and 20 myopes (–3.4±1.7 D). The stimulus and analysis techniques were confirmed using responses of two dichromats. For the entire participant group, the estimated central L/M cone ratios ranged from 0.56 to 1.80 in the central 3°-13° diameter ring and from 0.94 to 1.91 in the more peripheral 13°-30° diameter ring. Within 3°-13°, the mean L/M cone ratio of the emmetropic group was 1.20±0.33 and the mean was similar, 1.20±0.26, for the myopic group. For the 13°-30° ring, the mean L/M cone ratio of the emmetropic group was 1.48±0.27 and it was slightly lower in the myopic group, 1.30±0.27. Independent-samples t-test indicated no significant difference between the L/M cone ratios of the emmetropic and myopic group for either the central 3°-13° ring (p=0.986) or the more peripheral 13°-30° ring (p=0.108). The similar distributions of estimated L/M cone ratios in the sample of emmetropes and myopes indicates that there is likely to be no association between the L/M cone ratio and refractive error in humans.

Subjects/Keywords: colour vision; cones; emmetropia; L/M cone ratios; myopia; multifocal visual evoked potential (mFVEP); retina; visual evoked potential (VEP)

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APA (6^th Edition):

Zhou, N. (2013). Cone signals and activity in myopia and emmetropia. (Thesis). Queensland University of Technology. Retrieved from https://eprints.qut.edu.au/63463/

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Chicago Manual of Style (16^th Edition):

Zhou, Nanyu. “Cone signals and activity in myopia and emmetropia.” 2013. Thesis, Queensland University of Technology. Accessed March 07, 2021. https://eprints.qut.edu.au/63463/.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

MLA Handbook (7^th Edition):

Zhou, Nanyu. “Cone signals and activity in myopia and emmetropia.” 2013. Web. 07 Mar 2021.

Vancouver:

Zhou N. Cone signals and activity in myopia and emmetropia. [Internet] [Thesis]. Queensland University of Technology; 2013. [cited 2021 Mar 07]. Available from: https://eprints.qut.edu.au/63463/.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Council of Science Editors:

Zhou N. Cone signals and activity in myopia and emmetropia. [Thesis]. Queensland University of Technology; 2013. Available from: https://eprints.qut.edu.au/63463/

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Victoria University of Wellington

4. Hewitt, Kelly. Neural Indices of Emotional Distraction.

Degree: 2019, Victoria University of Wellington

URL: http://hdl.handle.net/10063/8644

► Emotional stimuli capture our attention. The preferential processing of emotional information is an adaptive mechanism that when relevant to our goal highlights potentially important aspects… (more)

▼ Emotional stimuli capture our attention. The preferential processing of emotional information is an adaptive mechanism that when relevant to our goal highlights potentially important aspects in the environment. However, when emotional information is task-irrelevant, their presence in the environment can trigger involuntary shifts in attention that cause detriments to performance. One challenge to investigating emotional distraction in the lab is how to objectively investigate the allocation of attention between different elements on the same stimulus display (e.g. between the task and the distractors). One neural measure that overcomes this issue is the Steady-State-Visual-Evoked-Potential (SSVEP). An SSVEP is the neural response of the visual cortex to a flickering stimulus and can be used as a measure of attentional resource allocation (Norcia, Appelbaum, Ales, Cottereau, & Rossion, 2015). In the past, emotional distraction has been studied using spatially separated tasks and distractors. The current thesis presents two experiments using SSVEPs to investigate emotional distraction in a superimposed design. Experiment 1 aimed to conceptually replicate Hindi Attar and colleagues (2010) who developed an SSVEP emotional distraction paradigm to examine attentional resource allocation between background task-irrelevant emotional distractors and a foreground dot-motion task. Participants viewed a stimulus display of moving, flickering dots, while positive or neutrally valanced distractors (or unidentifiable scrambles) were presented in the background of the task. SSVEPs were reduced in the presence of positive intact compared to neutral intact distractors suggesting that the presentation of task-irrelevant emotional stimuli in the same spatial location as a foreground task initiates an involuntary shift of attention away from the task. Unexpectedly, in both Experiments 1 and 2 valence differences were found in SSVEPs between positive and neutral scrambled images; this suggests that there are some perceptual differences between the stimulus sets (e.g. colour) contributing to the drop in SSVEP found for positive intact images. Importantly, in the SSVEP analysis significant valence x image type interactions were found, demonstrating that the drop for positive images was stronger for intact than scrambled image conditions, suggesting that a significant amount of the drop in SSVEP was driven by a difference in valence between the intact distractors. Behavioural results also suggest evidence for emotional distraction through reduced hit rate in the presence of positive intact images compared to neutral intact images in Experiment 1, and reduced detection sensitivity and response criterion for positive intact images in Experiment 2. Overall, the current thesis demonstrates support for the hypothesis that emotional information is more distracting than neutral information and provides a valuable starting point for the examination of emotion attention interactions when the task and distractors share the same location. Future… Advisors/Committee Members: Grimshaw, Gina.

Subjects/Keywords: Emotional distraction; SSVEP; EEG; Electroencephalography; Steady-State-Visual-Evoked-Potential

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APA (6^th Edition):

Hewitt, K. (2019). Neural Indices of Emotional Distraction. (Masters Thesis). Victoria University of Wellington. Retrieved from http://hdl.handle.net/10063/8644

Chicago Manual of Style (16^th Edition):

Hewitt, Kelly. “Neural Indices of Emotional Distraction.” 2019. Masters Thesis, Victoria University of Wellington. Accessed March 07, 2021. http://hdl.handle.net/10063/8644.

MLA Handbook (7^th Edition):

Hewitt, Kelly. “Neural Indices of Emotional Distraction.” 2019. Web. 07 Mar 2021.

Vancouver:

Hewitt K. Neural Indices of Emotional Distraction. [Internet] [Masters thesis]. Victoria University of Wellington; 2019. [cited 2021 Mar 07]. Available from: http://hdl.handle.net/10063/8644.

Council of Science Editors:

Hewitt K. Neural Indices of Emotional Distraction. [Masters Thesis]. Victoria University of Wellington; 2019. Available from: http://hdl.handle.net/10063/8644

Delft University of Technology

5. Ploemen, Milou (author). Rapid Acquisition of the Stimulus Response Relationship using Visual Evoked Potentials.

Degree: 2021, Delft University of Technology

URL: http://resolver.tudelft.nl/uuid:960075fe-6484-4489-ad94-ff7d98d401ed

►

The flash visual evoked potential (FVEP) is an electrical potential recorded with electroencephalogram (EEG) at the occipital cortex. Current FVEP assessment may be elaborated with… (more)

▼

The flash visual evoked potential (FVEP) is an electrical potential recorded with electroencephalogram (EEG) at the occipital cortex. Current FVEP assessment may be elaborated with the acquisition of stimulus response (SR) relation of the visual system. A drawback of this adjustment is the time required for data acquisition. This study aimed to develop an optimal (rapid) stimulus paradigm for assessing the SR relationship using FVEP.SR relationships were obtained using two different protocols in eight healthy participants; one considered 100 stimuli for 10 different intensity levels (standard technique), the other considered 1000 stimuli of varying intensity levels within a fixed intensity range (novel technique). Hypothetically the novel technique produces a similar SR relationship but requiring reduced number of stimuli. However, the present study did not find a significant intensity dependency on the FVEP. Consequently, no mathematical model for the SR relation was fit to the data, and exploration of the novel technique was excluded. Instead, the present study investigated the minimal number of stimuli required to acquire a representative FVEP component. Secondly, the potential change of FVEP components during the experiment was investigated. This study demonstrates that it is possible to acquire a reliable FVEP component with on average 54 stimuli (gross mean (39) + 1 SD (14)), independent of stimulus intensity. Additionally, this study demonstrated that the FVEP components change significantly (p<0.05) for most stimulus intensities when 1000 or more flashes are used; amplitudes increased with time for low intensity stimulation, while amplitudes reduced with time for high intensity stimulation. Although the present study did not find an intensity dependency of the FVEP component, it demonstrated that stimulation time is an important parameter when acquiring SR relationships using FVEP. The stimulation time certainly influenced the SR relationship calculated in the present study. Further studies can and should reduce the number of stimuli to produce a representative SR relationship using FVEP.

Biomedical Engineering

Advisors/Committee Members: van de Ruit, M.L. (mentor), Schouten, A.C. (graduation committee), Smit, G. (graduation committee), Delft University of Technology (degree granting institution).

Subjects/Keywords: Electroencephalography (EEG); Flash Visual Evoked Potential (FVEP); Stimulus-Response (SR) Curve

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APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6^th Edition):

Ploemen, M. (. (2021). Rapid Acquisition of the Stimulus Response Relationship using Visual Evoked Potentials. (Masters Thesis). Delft University of Technology. Retrieved from http://resolver.tudelft.nl/uuid:960075fe-6484-4489-ad94-ff7d98d401ed

Chicago Manual of Style (16^th Edition):

Ploemen, Milou (author). “Rapid Acquisition of the Stimulus Response Relationship using Visual Evoked Potentials.” 2021. Masters Thesis, Delft University of Technology. Accessed March 07, 2021. http://resolver.tudelft.nl/uuid:960075fe-6484-4489-ad94-ff7d98d401ed.

MLA Handbook (7^th Edition):

Ploemen, Milou (author). “Rapid Acquisition of the Stimulus Response Relationship using Visual Evoked Potentials.” 2021. Web. 07 Mar 2021.

Vancouver:

Ploemen M(. Rapid Acquisition of the Stimulus Response Relationship using Visual Evoked Potentials. [Internet] [Masters thesis]. Delft University of Technology; 2021. [cited 2021 Mar 07]. Available from: http://resolver.tudelft.nl/uuid:960075fe-6484-4489-ad94-ff7d98d401ed.

Council of Science Editors:

Ploemen M(. Rapid Acquisition of the Stimulus Response Relationship using Visual Evoked Potentials. [Masters Thesis]. Delft University of Technology; 2021. Available from: http://resolver.tudelft.nl/uuid:960075fe-6484-4489-ad94-ff7d98d401ed

6. McDermott, Kyle. Unipolar chromatic contrast mechanisms behave similarly to, but independently from, classically conceived bipolar chromatic contrast mechanisms.

Degree: 2012, University of Nevada – Reno

URL: http://hdl.handle.net/11714/3661

► The encoding of chromatic contrast is traditionally viewed as a bi-directional, opponent process wherein two opposite colors are compared by a given set of contrast… (more)

Subjects/Keywords: Chromatic Adaptation; Chromatic Contrast; Isoluminance; Visual Evoked Potential

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APA (6^th Edition):

McDermott, K. (2012). Unipolar chromatic contrast mechanisms behave similarly to, but independently from, classically conceived bipolar chromatic contrast mechanisms. (Thesis). University of Nevada – Reno. Retrieved from http://hdl.handle.net/11714/3661

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Chicago Manual of Style (16^th Edition):

McDermott, Kyle. “Unipolar chromatic contrast mechanisms behave similarly to, but independently from, classically conceived bipolar chromatic contrast mechanisms.” 2012. Thesis, University of Nevada – Reno. Accessed March 07, 2021. http://hdl.handle.net/11714/3661.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

MLA Handbook (7^th Edition):

McDermott, Kyle. “Unipolar chromatic contrast mechanisms behave similarly to, but independently from, classically conceived bipolar chromatic contrast mechanisms.” 2012. Web. 07 Mar 2021.

Vancouver:

McDermott K. Unipolar chromatic contrast mechanisms behave similarly to, but independently from, classically conceived bipolar chromatic contrast mechanisms. [Internet] [Thesis]. University of Nevada – Reno; 2012. [cited 2021 Mar 07]. Available from: http://hdl.handle.net/11714/3661.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Council of Science Editors:

McDermott K. Unipolar chromatic contrast mechanisms behave similarly to, but independently from, classically conceived bipolar chromatic contrast mechanisms. [Thesis]. University of Nevada – Reno; 2012. Available from: http://hdl.handle.net/11714/3661

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

7. Roth, Eric John. Simultaneous Recording Reveals Attentional Modulation of Chromatic Visual Evoked Potentials.

Degree: 2011, University of Nevada – Reno

URL: http://hdl.handle.net/11714/3966

► Prior research has shown that the chromatic pattern-onset VEP is robust to attentional manipulations when test and distracter stimuli are either superimposed or spatially separated.… (more)

Subjects/Keywords: Achromatic; Attention; Chromatic; Parafoveal; Vision; Visual Evoked Potential

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APA (6^th Edition):

Roth, E. J. (2011). Simultaneous Recording Reveals Attentional Modulation of Chromatic Visual Evoked Potentials. (Thesis). University of Nevada – Reno. Retrieved from http://hdl.handle.net/11714/3966

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Chicago Manual of Style (16^th Edition):

Roth, Eric John. “Simultaneous Recording Reveals Attentional Modulation of Chromatic Visual Evoked Potentials.” 2011. Thesis, University of Nevada – Reno. Accessed March 07, 2021. http://hdl.handle.net/11714/3966.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

MLA Handbook (7^th Edition):

Roth, Eric John. “Simultaneous Recording Reveals Attentional Modulation of Chromatic Visual Evoked Potentials.” 2011. Web. 07 Mar 2021.

Vancouver:

Roth EJ. Simultaneous Recording Reveals Attentional Modulation of Chromatic Visual Evoked Potentials. [Internet] [Thesis]. University of Nevada – Reno; 2011. [cited 2021 Mar 07]. Available from: http://hdl.handle.net/11714/3966.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Council of Science Editors:

Roth EJ. Simultaneous Recording Reveals Attentional Modulation of Chromatic Visual Evoked Potentials. [Thesis]. University of Nevada – Reno; 2011. Available from: http://hdl.handle.net/11714/3966

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

University of Georgia

8. Knight, Justin Bradley. Fulfillment of event-based intentions can be multiply determined.

Degree: 2014, University of Georgia

URL: http://hdl.handle.net/10724/26373

► Event-based prospective memory (PM) refers to the cognitive processes that enable completion of intentions by relying on some environmental cue. There is an ongoing debate… (more)

Subjects/Keywords: Prospective memory; Steady state visual evoked potential (SSVEP); Attention; Event-related potential (ERP)

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APA (6^th Edition):

Knight, J. B. (2014). Fulfillment of event-based intentions can be multiply determined. (Thesis). University of Georgia. Retrieved from http://hdl.handle.net/10724/26373

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Chicago Manual of Style (16^th Edition):

Knight, Justin Bradley. “Fulfillment of event-based intentions can be multiply determined.” 2014. Thesis, University of Georgia. Accessed March 07, 2021. http://hdl.handle.net/10724/26373.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

MLA Handbook (7^th Edition):

Knight, Justin Bradley. “Fulfillment of event-based intentions can be multiply determined.” 2014. Web. 07 Mar 2021.

Vancouver:

Knight JB. Fulfillment of event-based intentions can be multiply determined. [Internet] [Thesis]. University of Georgia; 2014. [cited 2021 Mar 07]. Available from: http://hdl.handle.net/10724/26373.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Council of Science Editors:

Knight JB. Fulfillment of event-based intentions can be multiply determined. [Thesis]. University of Georgia; 2014. Available from: http://hdl.handle.net/10724/26373

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

9. Lustoza, Adriana Cabral. Potencial visual evocado por flashes de luz em cães diabéticos com catarata.

Degree: Mestrado, Clínica Cirúrgica Veterinária, 2008, University of São Paulo

URL: http://www.teses.usp.br/teses/disponiveis/10/10137/tde-23012009-140119/ ;

► Os cães têm apresentado uma maior prevalência de DM nos últimos anos, sendo uma das endocrinopatias mais comuns. As complicações a curto e longo prazo… (more)

▼ Os cães têm apresentado uma maior prevalência de DM nos últimos anos, sendo uma das endocrinopatias mais comuns. As complicações a curto e longo prazo incluem alterações retinianas, renais e neurológicas. Dentre as alterações mais evidentes podemos citar o desenvolvimento de cataratas e alterações nas vias visuais. As alterações das vias visuais são detectadas precocemente por testes eletrofisiológicos, métodos objetivos que independem da informação do paciente e necessitam de pouca colaboração para serem executados. Neste estudo utilizamos o PVE-F, que consiste em potenciais de baixa amplitude registrados quando a retina é submetida à estimulação visual adequada em uma cúpula de campo total, e avalia a integridade das vias ópticas desde a retina até o córtex occipital. Com este estudo objetivamos avaliar as alterações das vias visuais do PVE-F em cães diabéticos portadores de catarata, consoante os critérios da ISCEV. Para o projeto foram utilizados 59 cães, selecionados quanto aos melhores registros e com menor interferência, com idade variando entre 5 e 14 anos, de pequeno à médio porte (até 20kg) de diferentes raças, 46 fêmeas e 13 machos, encaminhados ao Serviço de Oftalmologia do Hospital Veterinário da Faculdade de Medicina Veterinária e Zootecnia da Universidade de São Paulo. Os animais foram divididos em 3 grupos: grupo normal (GN) cães adultos hígidos; grupo catarata (GC) cães apresentando catarata madura ou hipermadura; grupo diabético (GD) cães apresentando catarata madura ou hipermadura, com diabetes mellitus. Todos os grupos foram analisados quanto à latência (ms) e quanto à amplitude (V). O registro do PVE foi obtido por eletrodos de contato superficial utilizando o Sistema Eletrodiagnóstico Computadorizado Veris 2000 com frequência de 2Hz totalizando 180 estímulos. Os animais permaneceram com a cabeça introduzida no interior da cúpula geradora dos flashes de luz branca (Ganzfeld) durante todo o exame. Os potenciais foram registrados em ambos os olhos, no olho direito (ocluindo olho esquerdo) e posteriormente no olho esquerdo (ocluindo olho direito). Em relação ao pico P2 houve semelhança entre os olhos examinados, porém os valores das médias do GD foram maiores que os demais, com significância estatística ao GN (p=0,001) e ao GC (p=0,000). O GD apresentou valores de médias: AO 97,72ms; OD 98,10ms e OE 97,21ms. O GC apresentou valores de médias: AO 86,73ms; OD 86,27ms e OE 86,87ms. O GN apresentou valores de médias: AO 73,20ms; OD 74,53ms e OE 74,33ms. A amplitude (µV) dos intervalos N1-P1, P1-N2 e P2-N2 mostrou semelhança entre os grupos estudados (GN, GC e GD). Porém, os intervalos P1-N2 e N2-P2 apresentaram diferenças entre os olhos, com valores de médias de AO maiores em relação ao OD e OE estatísticamente significantes (p=0,000). No estudo realizado, os valores de glicemia estavam maiores no GD, com uma média de 202,79 mg/dl, enquanto que o GN apresentou média de 78,47 mg/dl e o GC 74,80 mg/dl. Conclui-se que as alterações nas vias visuais estão presentes nos cães diabéticos independentemente… Advisors/Committee Members: Barros, Paulo Sergio de Moraes.

Subjects/Keywords: Cães; Cataract; Catarata; Diabetes mellitus; Diabetes mellitus; Dogs; Potencial visual evocado; Visual evoked potential

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APA (6^th Edition):

Lustoza, A. C. (2008). Potencial visual evocado por flashes de luz em cães diabéticos com catarata. (Masters Thesis). University of São Paulo. Retrieved from http://www.teses.usp.br/teses/disponiveis/10/10137/tde-23012009-140119/ ;

Chicago Manual of Style (16^th Edition):

Lustoza, Adriana Cabral. “Potencial visual evocado por flashes de luz em cães diabéticos com catarata.” 2008. Masters Thesis, University of São Paulo. Accessed March 07, 2021. http://www.teses.usp.br/teses/disponiveis/10/10137/tde-23012009-140119/ ;.

MLA Handbook (7^th Edition):

Lustoza, Adriana Cabral. “Potencial visual evocado por flashes de luz em cães diabéticos com catarata.” 2008. Web. 07 Mar 2021.

Vancouver:

Lustoza AC. Potencial visual evocado por flashes de luz em cães diabéticos com catarata. [Internet] [Masters thesis]. University of São Paulo; 2008. [cited 2021 Mar 07]. Available from: http://www.teses.usp.br/teses/disponiveis/10/10137/tde-23012009-140119/ ;.

Council of Science Editors:

Lustoza AC. Potencial visual evocado por flashes de luz em cães diabéticos com catarata. [Masters Thesis]. University of São Paulo; 2008. Available from: http://www.teses.usp.br/teses/disponiveis/10/10137/tde-23012009-140119/ ;

University of Bradford

10. Mankowska, Aleksandra Maria. Functional aspects of blur adaptation in human vision : a study of the mechanism of blur adaptation in human vision : its origin and scope evidenced using subjective and objective procedures.

Degree: PhD, 2013, University of Bradford

URL: http://hdl.handle.net/10454/6329

► Sensory adaptation to blur improves visual acuity under defocused conditions. This phenomenon has been successfully demonstrated using subjective measures of acuity and is known as… (more)

Subjects/Keywords: 617.7; Blur adaptation; Parafovea; Visual acuity; Electroretinogram; Visual evoked potential; Optical coherence tomography

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APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6^th Edition):

Mankowska, A. M. (2013). Functional aspects of blur adaptation in human vision : a study of the mechanism of blur adaptation in human vision : its origin and scope evidenced using subjective and objective procedures. (Doctoral Dissertation). University of Bradford. Retrieved from http://hdl.handle.net/10454/6329

Chicago Manual of Style (16^th Edition):

Mankowska, Aleksandra Maria. “Functional aspects of blur adaptation in human vision : a study of the mechanism of blur adaptation in human vision : its origin and scope evidenced using subjective and objective procedures.” 2013. Doctoral Dissertation, University of Bradford. Accessed March 07, 2021. http://hdl.handle.net/10454/6329.

MLA Handbook (7^th Edition):

Mankowska, Aleksandra Maria. “Functional aspects of blur adaptation in human vision : a study of the mechanism of blur adaptation in human vision : its origin and scope evidenced using subjective and objective procedures.” 2013. Web. 07 Mar 2021.

Vancouver:

Mankowska AM. Functional aspects of blur adaptation in human vision : a study of the mechanism of blur adaptation in human vision : its origin and scope evidenced using subjective and objective procedures. [Internet] [Doctoral dissertation]. University of Bradford; 2013. [cited 2021 Mar 07]. Available from: http://hdl.handle.net/10454/6329.

Council of Science Editors:

Mankowska AM. Functional aspects of blur adaptation in human vision : a study of the mechanism of blur adaptation in human vision : its origin and scope evidenced using subjective and objective procedures. [Doctoral Dissertation]. University of Bradford; 2013. Available from: http://hdl.handle.net/10454/6329

Swedish University of Agricultural Sciences

11. Ström, Lena. Visual evoked potentials in the horse.

Degree: 2019, Swedish University of Agricultural Sciences

URL: https://pub.epsilon.slu.se/16271/

► Vision is an important sense for horses, both for survival in the wild and when horses are used for work, sport or recreation. However, it… (more)

▼ Vision is an important sense for horses, both for survival in the wild and when horses are used for work, sport or recreation. However, it is often difficult to diagnose visual impairment in this species. Traditional techniques available in clinical equine practice, are based on subjective evaluations, and their results are many times difficult to interpret. Electrodiagnostic methods, flash electroretinography (FERG) and recording of flash visual evoked potentials (FVEP) are used to objectively evaluate the function of the retinal and post-retinal visual pathways. The electrical potentials generated in response to brief visual stimuli are measured non-invasively. Abnormal function in visual pathways can affect the FERG and FVEP waveforms, peak times and amplitudes. Lesions can thereby be detected, and their approximate localization evaluated. FVEPs are used in human medicine, and occasionally in animal species, but have not been described in the horse. The general aim of this thesis was to establish a technique for recording of FVEPs in horses in clinical practice. The results showed that FVEPs can be readily recorded in sedated horses in a clinical setting. The recorded waveform consisted of a series of positive (P1-P5) and negative (N1-N2) wavelets. The overall appearance of the waveform was shown to be similar in foals, young horses and adult horses. An age-related effect on peak times and amplitudes was observed, but most of the changes occurred early in life. Important data on FVEP variability and repeatability was reported, and it was concluded that P2, N2 and P4 peak times should be included in the evaluation of equine, clinical FVEPs. The large inherent variability of FVEP amplitudes made them less useful, but they occasionally provided support to a clinical diagnosis. In clinical patients, electrodiagnostic testing helped assessing functional impact of potentially visual-threatening diseases. By recording FERGs and FVEPs simultaneously, a subdivision into retinal vs post-retinal dysfunction could be made in many patients, such as horses with optic neuropathies and cortical visual impairment. FVEPs may also be of prognostic value in horses with traumatic optic neuropathy and possibly in cases with cortical visual impairment. The results from this thesis, opens up for the use of the FVEP as an adjunctive, objective method in the evaluation of equine patients with suspected visual impairment and neurological disease, but also for studies of development and function of the visual pathways in this species.

Subjects/Keywords: visual evoked potential; VEP; electroretinogram; ERG; horse; vision; visual impairment; blindness; retina; optic nerve; visual cortex

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APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6^th Edition):

Ström, L. (2019). Visual evoked potentials in the horse. (Doctoral Dissertation). Swedish University of Agricultural Sciences. Retrieved from https://pub.epsilon.slu.se/16271/

Chicago Manual of Style (16^th Edition):

Ström, Lena. “Visual evoked potentials in the horse.” 2019. Doctoral Dissertation, Swedish University of Agricultural Sciences. Accessed March 07, 2021. https://pub.epsilon.slu.se/16271/.

MLA Handbook (7^th Edition):

Ström, Lena. “Visual evoked potentials in the horse.” 2019. Web. 07 Mar 2021.

Vancouver:

Ström L. Visual evoked potentials in the horse. [Internet] [Doctoral dissertation]. Swedish University of Agricultural Sciences; 2019. [cited 2021 Mar 07]. Available from: https://pub.epsilon.slu.se/16271/.

Council of Science Editors:

Ström L. Visual evoked potentials in the horse. [Doctoral Dissertation]. Swedish University of Agricultural Sciences; 2019. Available from: https://pub.epsilon.slu.se/16271/

University of Waterloo

12. Ravi, Aravind. Enhancing the Decoding Performance of Steady-State Visual Evoked Potentials based Brain-Computer Interface.

Degree: 2019, University of Waterloo

URL: http://hdl.handle.net/10012/14881

► Non-invasive Brain-Computer Interfaces (BCIs) based on steady-state visual evoked potential (SSVEP) responses are the most widely used BCI. SSVEP are responses elicited in the visual… (more)

▼ Non-invasive Brain-Computer Interfaces (BCIs) based on steady-state visual evoked potential (SSVEP) responses are the most widely used BCI. SSVEP are responses elicited in the visual cortex when a user gazes at an object flickering at a certain frequency. In this thesis, we investigate different BCI system design parameters for enhancing the detection of SSVEP such as change in inter-stimulus distance (ISD), EEG channels, detection algorithms and training methodologies. Closely placed SSVEP stimuli compete for neural representations. This influences the performance and limits the flexibility of the stimulus interface. In this thesis, we study the influence of changing ISD on the decoding performance of an SSVEP BCI. We propose: (i) a user-specific channel selection method and (ii) using complex spectrum features as input to a convolutional neural network (C-CNN) to overcome this challenge. We also evaluate the proposed C-CNN method in a user-independent (UI) training scenario as this will lead to a minimal calibration system and provide the ability to run inference in a plug-and-play mode. The proposed methods were evaluated on a 7-class SSVEP dataset collected on 21 healthy participants (Dataset 1). The UI method was also assessed on a publicly available 12-class dataset collected on 10 healthy participants (Dataset 2). We compared the proposed methods with canonical correlation analysis (CCA) and CNN classification using magnitude spectrum features (M-CNN). We demonstrated that the user-specific channel set (UC) is robust to change in ISD (viewing angles of 5.24ᵒ, 8.53ᵒ, and 12.23ᵒ) compared to the classic 3-channel set (3C - O1, O2, Oz) and 6-channel set (6C - PO3, PO4, POz, O1, O2, Oz). A significant improvement in accuracy of over 5% (p=0.001) and a reduction in variation of 56% (p=0.035) was achieved across ISDs using the UC set compared to the 3C set and 6C set. Secondly, the proposed C-CNN method obtained a significantly higher classification accuracy across ISDs and window lengths compared to M-CNN and CCA. The average accuracy of the C-CNN increased by over 12.8% compared to CCA and an increase of over 6.5% compared to the M-CNN for the closest ISD across all window lengths was achieved. Thirdly, the C-CNN method achieved the highest accuracy in both UD and UI training scenarios on both 7-class and 12-class SSVEP Datasets. The overall accuracies of the different methods for 1 s window length for Dataset 1 were: CCA: 69.1±10.8%, UI-M-CNN: 73.5±16.1%, UI-C-CNN: 81.6±12.3%, UD-M-CNN: 87.8±7.6% and UD-C-CNN: 92.5±5%. And for Dataset 2 were: CCA: 62.7±21.5%, UI-M-CNN: 70.5±22%, UI-C-CNN: 81.6±18%, UD-M-CNN: 82.8±16.7%, and UD-C-CNN: 92.3±11.1%. In summary, using the complex spectrum features, the C-CNN likely learned to use both frequency and phase related information to classify SSVEP responses. Therefore, the CNN can be trained independent of the ISD resulting in a model that generalizes to other ISDs. This suggests that the proposed methods are robust to changes in inter-stimulus distance for…

Subjects/Keywords: brain-computer interfaces; convolutional neural networks; electroencephalography; steady-state visual evoked potential

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APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6^th Edition):

Ravi, A. (2019). Enhancing the Decoding Performance of Steady-State Visual Evoked Potentials based Brain-Computer Interface. (Thesis). University of Waterloo. Retrieved from http://hdl.handle.net/10012/14881

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Chicago Manual of Style (16^th Edition):

Ravi, Aravind. “Enhancing the Decoding Performance of Steady-State Visual Evoked Potentials based Brain-Computer Interface.” 2019. Thesis, University of Waterloo. Accessed March 07, 2021. http://hdl.handle.net/10012/14881.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

MLA Handbook (7^th Edition):

Ravi, Aravind. “Enhancing the Decoding Performance of Steady-State Visual Evoked Potentials based Brain-Computer Interface.” 2019. Web. 07 Mar 2021.

Vancouver:

Ravi A. Enhancing the Decoding Performance of Steady-State Visual Evoked Potentials based Brain-Computer Interface. [Internet] [Thesis]. University of Waterloo; 2019. [cited 2021 Mar 07]. Available from: http://hdl.handle.net/10012/14881.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Council of Science Editors:

Ravi A. Enhancing the Decoding Performance of Steady-State Visual Evoked Potentials based Brain-Computer Interface. [Thesis]. University of Waterloo; 2019. Available from: http://hdl.handle.net/10012/14881

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

University of Toronto

13. Gnanasegaram, Joshua Jeyakumar. Characterizing Vestibular Stimulation in Children with Cochlear Implants.

Degree: 2016, University of Toronto

URL: http://hdl.handle.net/1807/74833

►

Though vestibular impairment is highly prevalent in children with sensorineural hearing loss who use cochlear implants (CIs), improvements in balance function upon device activation have… (more)

Subjects/Keywords: cochlear implant; pediatric; subjective visual vertical; vestibular; vestibular evoked myogenic potential; 0564

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APA (6^th Edition):

Gnanasegaram, J. J. (2016). Characterizing Vestibular Stimulation in Children with Cochlear Implants. (Masters Thesis). University of Toronto. Retrieved from http://hdl.handle.net/1807/74833

Chicago Manual of Style (16^th Edition):

Gnanasegaram, Joshua Jeyakumar. “Characterizing Vestibular Stimulation in Children with Cochlear Implants.” 2016. Masters Thesis, University of Toronto. Accessed March 07, 2021. http://hdl.handle.net/1807/74833.

MLA Handbook (7^th Edition):

Gnanasegaram, Joshua Jeyakumar. “Characterizing Vestibular Stimulation in Children with Cochlear Implants.” 2016. Web. 07 Mar 2021.

Vancouver:

Gnanasegaram JJ. Characterizing Vestibular Stimulation in Children with Cochlear Implants. [Internet] [Masters thesis]. University of Toronto; 2016. [cited 2021 Mar 07]. Available from: http://hdl.handle.net/1807/74833.

Council of Science Editors:

Gnanasegaram JJ. Characterizing Vestibular Stimulation in Children with Cochlear Implants. [Masters Thesis]. University of Toronto; 2016. Available from: http://hdl.handle.net/1807/74833

14. A. Arena. EFFECTS OF GENERAL ANESTHETICS ON VISUAL CORTEX EVOKED AND RESTING ACTIVITY.

Degree: 2014, Università degli Studi di Milano

URL: http://hdl.handle.net/2434/238236

► Even though anesthetics are widely used in the medical practice, there are still unresolved issues which relate to their mechanisms of action and therefore to… (more)

▼ Even though anesthetics are widely used in the medical practice, there are still unresolved issues which relate to their mechanisms of action and therefore to their ability to induce loss of consciousness. Since a large number of very different chemical molecules are used in general anesthesia, a large variety of potential molecular targets might exist. Some of these might relate to axonal conduction and membrane excitability. In some cases, this action could either occur at the presynaptic level, modifying the neurotransmitter release and reuptake machineries, or at the postsynaptic level, modifying the number and/or sensitivity of post-synaptic receptors. These functional alterations might also selectively affect one or more specific neuronal phenotypes. Nevertheless, despite the complexity of their molecular targets, all general anesthetics induce a profound inhibition of the awake functions without suppressing the cortical EEG activity and sparing evoked cortical responses. Therefore, anesthetics should lead to the loss of consciousness by altering the signal processing of the brain, rather than by abolishing its activity. Based on these considerations, I began the investigation of the electrophysiological alterations induced by various classes of general anesthetics, on the activity of the rat visual system to uncover some aspects of their mechanisms of action. In this project I compared the effects of three states of anesthesia induced by two different molecules, sevofluorane, a volatile general anesthetic, and propofol, which is intravenously injected. For these experiments rats were curarized, mechanically ventilated and the body temperature was controlled. During states of anesthesia, visual evoked potentials were recorded by means of superficial electrodes implanted in the skull. Two functional properties of the visual processing were evaluated: i) the sensitivity to stimuli of different brightness and ii) the dichotomy of the ON/OFF response, which is essential for contrast detection. Moreover, the EEG resting activity was recorded. The preliminary results showed that the overall basal cortical activity was reduced in a comparative manner between the two drugs throughout the three states of anesthesia. Otherwise, significant differences were found in the power of alpha and gamma EEG oscillations and in the effects on the visual evoked activity, suggesting the presence of two very distinct circuital mechanisms of action and providing novel information about the ability of anesthetics to induce loss of consciousness. Advisors/Committee Members: tutor: A. Malgaroli, coordinatore: M. Mazzanti, MAZZANTI, MICHELE.

Subjects/Keywords: anesthetic; sevoflurane; propofol; loss of consciousness; EEG; evoked potential; visual system; Settore BIO/09 - Fisiologia

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APA (6^th Edition):

Arena, A. (2014). EFFECTS OF GENERAL ANESTHETICS ON VISUAL CORTEX EVOKED AND RESTING ACTIVITY. (Thesis). Università degli Studi di Milano. Retrieved from http://hdl.handle.net/2434/238236

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Chicago Manual of Style (16^th Edition):

Arena, A.. “EFFECTS OF GENERAL ANESTHETICS ON VISUAL CORTEX EVOKED AND RESTING ACTIVITY.” 2014. Thesis, Università degli Studi di Milano. Accessed March 07, 2021. http://hdl.handle.net/2434/238236.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

MLA Handbook (7^th Edition):

Arena, A.. “EFFECTS OF GENERAL ANESTHETICS ON VISUAL CORTEX EVOKED AND RESTING ACTIVITY.” 2014. Web. 07 Mar 2021.

Vancouver:

Arena A. EFFECTS OF GENERAL ANESTHETICS ON VISUAL CORTEX EVOKED AND RESTING ACTIVITY. [Internet] [Thesis]. Università degli Studi di Milano; 2014. [cited 2021 Mar 07]. Available from: http://hdl.handle.net/2434/238236.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Council of Science Editors:

Arena A. EFFECTS OF GENERAL ANESTHETICS ON VISUAL CORTEX EVOKED AND RESTING ACTIVITY. [Thesis]. Università degli Studi di Milano; 2014. Available from: http://hdl.handle.net/2434/238236

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

University of Illinois – Chicago

15. Kamdar, Foram. Electrophysiological Assessment of Internal Noise in the Human Visual Pathway.

Degree: 2018, University of Illinois – Chicago

URL: http://hdl.handle.net/10027/23058

► Purpose. Noise is present throughout the visual system, from photoreceptors to visual cortex. The internal noise of the visual system that limits function has been… (more)

▼ Purpose. Noise is present throughout the visual system, from photoreceptors to visual cortex. The internal noise of the visual system that limits function has been studied for several decades using behavioral techniques in humans, which is an inherently subjective approach. Furthermore, behavioral noise measurements represent the combined contributions from all sites within the visual pathway, such that retinal noise cannot be separated from cortical noise. The goal of this thesis is to develop objective, electrophysiological methodologies to estimate noise that arises from different sites within the visual pathway. This was accomplished by completing the following three Specific Aims: Aim 1 developed novel noise-based electrophysiological measures. Aim 2 determined how stimulus temporal frequency affects internal noise measurements. Aim 3 developed a simplified protocol that can be applied to patient populations to study how pathology affects internal noise. Methods. Five control subjects and two subjects with diabetic retinopathy were recruited. Amplitude of the flicker electroretinogram (fERG; a measure of photoreceptor and bipolar cell function), the pattern electroretinogram (pERG; a measure of retinal ganglion cell function), and the flicker visual evoked potential (fVEP; a measure of cortical function) were measured as a function of stimulus contrast. Amplitude of the fundamental and second harmonic responses were derived by Fourier transforms. Measurements were performed in the absence of luminance noise and in white luminance noise of different power. Threshold, defined as the minimum stimulus contrast needed to elicit a measurable response, was derived from the amplitude measures based on Naka-Rushton fits to the response amplitude vs signal contrast data. Threshold was then plotted as a function of luminance noise power and the data were fit with the Linear Amplifier Model, a common model of visual performance in noise. A clinically optimized protocol was developed and implemented based on the data of Aims 1 and 2. Results. Luminance noise had no effect on the fundamental component of the fERG and fVEP. Consequently, fundamental fERG and fVEP contrast thresholds were independent of noise power. However, noise did reduce the second harmonic component of the fERG, fVEP, and pERG. The mean internal noise (Neq) for the fERG (0.38±0.04) was greater than that of the fVEP (0.17±0.03), but similar to that of the pERG (0.33±0.05). Stimulus temporal frequency had no effect on Neq for the fERG and slightly increased Neq with increasing temporal frequency for the fVEP. Contrast threshold and Neq in diabetic retinopathy were normal for the fERG and fVEP, but elevated for the pERG. Conclusion. This thesis provides the first objective assessment of internal noise in the human visual pathway using electrophysiology. The effect of noise on the second harmonic, but not the fundamental, for each measure can be accounted for by a linear-nonlinear-linear cascade model. The surprising finding that cortical noise is lower than… Advisors/Committee Members: McAnany, J.Jason (advisor), Hetling, John (committee member), Cao, Dingcai (committee member), McAnany, J.Jason (chair).

Subjects/Keywords: Flicker Electroretinogram; Pattern Electroretinogram; Flicker Visual Evoked Potential; Internal Noise; Linear Amplifi er Model

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APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6^th Edition):

Kamdar, F. (2018). Electrophysiological Assessment of Internal Noise in the Human Visual Pathway. (Thesis). University of Illinois – Chicago. Retrieved from http://hdl.handle.net/10027/23058

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Chicago Manual of Style (16^th Edition):

Kamdar, Foram. “Electrophysiological Assessment of Internal Noise in the Human Visual Pathway.” 2018. Thesis, University of Illinois – Chicago. Accessed March 07, 2021. http://hdl.handle.net/10027/23058.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

MLA Handbook (7^th Edition):

Kamdar, Foram. “Electrophysiological Assessment of Internal Noise in the Human Visual Pathway.” 2018. Web. 07 Mar 2021.

Vancouver:

Kamdar F. Electrophysiological Assessment of Internal Noise in the Human Visual Pathway. [Internet] [Thesis]. University of Illinois – Chicago; 2018. [cited 2021 Mar 07]. Available from: http://hdl.handle.net/10027/23058.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Council of Science Editors:

Kamdar F. Electrophysiological Assessment of Internal Noise in the Human Visual Pathway. [Thesis]. University of Illinois – Chicago; 2018. Available from: http://hdl.handle.net/10027/23058

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

16. Duncan, Chad S. Contrast adaptation reveals increased organizational complexity of chromatic processing in the visual evoked potential.

Degree: 2011, University of Nevada – Reno

URL: http://hdl.handle.net/11714/3965

► Results from psychophysics and single-unit recordings suggest that color vision comprises multiple stages of processing. Post-receptoral channels appear to consist of both a stage of… (more)

Subjects/Keywords: Adaptation; Chromatic adaptation; Color; Color model; Color vision; visual evoked potential (VEP)

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APA (6^th Edition):

Duncan, C. S. (2011). Contrast adaptation reveals increased organizational complexity of chromatic processing in the visual evoked potential. (Thesis). University of Nevada – Reno. Retrieved from http://hdl.handle.net/11714/3965

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Chicago Manual of Style (16^th Edition):

Duncan, Chad S. “Contrast adaptation reveals increased organizational complexity of chromatic processing in the visual evoked potential.” 2011. Thesis, University of Nevada – Reno. Accessed March 07, 2021. http://hdl.handle.net/11714/3965.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

MLA Handbook (7^th Edition):

Duncan, Chad S. “Contrast adaptation reveals increased organizational complexity of chromatic processing in the visual evoked potential.” 2011. Web. 07 Mar 2021.

Vancouver:

Duncan CS. Contrast adaptation reveals increased organizational complexity of chromatic processing in the visual evoked potential. [Internet] [Thesis]. University of Nevada – Reno; 2011. [cited 2021 Mar 07]. Available from: http://hdl.handle.net/11714/3965.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Council of Science Editors:

Duncan CS. Contrast adaptation reveals increased organizational complexity of chromatic processing in the visual evoked potential. [Thesis]. University of Nevada – Reno; 2011. Available from: http://hdl.handle.net/11714/3965

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Université Catholique de Louvain

17. Beck, Alexy Assaf. Visual perspective taking as investigated by fast periodic visual stimulation (FPVS).

Degree: 2018, Université Catholique de Louvain

URL: http://hdl.handle.net/2078.1/196457

►

Visual perspective taking (VPT) corresponds to our ability to see the world from another person's perspective. We investigated VPT using fast periodic visual stimulation (FPVS)… (more)

Subjects/Keywords: Visual perspective taking; Electroencephalogram; Fast Periodic Visual Stimulation; Steady-State Visually Evoked Potential; Theory of Mind

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APA (6^th Edition):

Beck, A. A. (2018). Visual perspective taking as investigated by fast periodic visual stimulation (FPVS). (Thesis). Université Catholique de Louvain. Retrieved from http://hdl.handle.net/2078.1/196457

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Chicago Manual of Style (16^th Edition):

Beck, Alexy Assaf. “Visual perspective taking as investigated by fast periodic visual stimulation (FPVS).” 2018. Thesis, Université Catholique de Louvain. Accessed March 07, 2021. http://hdl.handle.net/2078.1/196457.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

MLA Handbook (7^th Edition):

Beck, Alexy Assaf. “Visual perspective taking as investigated by fast periodic visual stimulation (FPVS).” 2018. Web. 07 Mar 2021.

Vancouver:

Beck AA. Visual perspective taking as investigated by fast periodic visual stimulation (FPVS). [Internet] [Thesis]. Université Catholique de Louvain; 2018. [cited 2021 Mar 07]. Available from: http://hdl.handle.net/2078.1/196457.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Council of Science Editors:

Beck AA. Visual perspective taking as investigated by fast periodic visual stimulation (FPVS). [Thesis]. Université Catholique de Louvain; 2018. Available from: http://hdl.handle.net/2078.1/196457

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

18. Highsmith, Jennifer R. The effects of selective attention on chromatic processing; pattern-onset VEP responses.

Degree: 2010, University of Nevada – Reno

URL: http://hdl.handle.net/11714/4290

► Intro: Electrophysiological and behavioral studies show that attention improves visual processing. Studies of chromatic steady-state and pattern-reversal visual evoked potentials (VEPs) support this. Typically in… (more)

▼ Intro: Electrophysiological and behavioral studies show that attention improves visual processing. Studies of chromatic steady-state and pattern-reversal visual evoked potentials (VEPs) support this. Typically in these studies VEP stimuli are displayed at one spatial location while distracter stimuli are displayed at a different spatial location. Waveform characteristics are shown to be attenuated when the VEP is unattended. More difficult distractor tasks have also shown to cause decrements in waveform characteristics. Typically, responses from extrastraite visual areas show robust effects with attentional modulations. Recording from lower visual areas such as V1 has not shown consistent attentional effects. Chromatic pattern-onset VEPs are thought to be low-level visual responses recorded over the primary occipital area. They have not been studied under conditions of selective attention. It is important to understand the effects of attentional shifts on the chromatic evoked potential because it has potential importance as a diagnostic tool in clinical settings where monitoring of attention can be difficult.Purpose: The present study measured the effects on the chromatic pattern-onset VEP with spatial and difficult, task-relevant attentional manipulations to show the sensitivity of this response to attentional shifts and the level of this response in the visual system. This study also aimed to determine if participant or patient monitoring is necessary when recording chromatic pattern-onset VEPs. Methods: Pattern stimuli were used to selectively activate the L-M and the S-(L+M) visual pathways. Waveform amplitudes and latencies were compared while attention was modulated with distractor tasks. In experiments one through four distractor stimuli were X's and O's presented out of synch with the VEP stimuli. In experiment one the VEP and distractor stimuli were spatially contiguous. In experiment two the VEP and distractor stimuli were spatially separated. In experiment three an achromatic pattern-reversal VEP was recorded with a spatially separate distractor. In experiment four VEP fixation was centrally located with the distractor presented in the periphery. In experiment five the VEP and distractor were presented in the same manner as experiment two, however the distractor was chromatic pattern-onset VEP stimuli identical to the recorded VEP stimuli but presented out of phase with the recorded stimuli. Results: Achromatic responses showed significant changes in amplitude and latency with attentional shifts. No significant changes were found for chromatic response in experiments one two, and four. In experiment five there was a marginally significant increase in amplitude for the VEP attention condition in the S-(L+M) pathway only. These results support the idea that chromatic pattern-onset responses may be low-level in the visual system. Additionally, for this response, it may not necessary to monitor attention in a laboratory or clinical setting. Advisors/Committee Members: Crognale, Michael A. (advisor), Webster, Michael A. (committee member), Wessinger, C. Mark (committee member), Nickles, Thomas J. (committee member), Burnham, Melissa M. (committee member).

Subjects/Keywords: Attention; Color; Visual Evoked Potential; Visual Pathways

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APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6^th Edition):

Highsmith, J. R. (2010). The effects of selective attention on chromatic processing; pattern-onset VEP responses. (Thesis). University of Nevada – Reno. Retrieved from http://hdl.handle.net/11714/4290

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Chicago Manual of Style (16^th Edition):

Highsmith, Jennifer R. “The effects of selective attention on chromatic processing; pattern-onset VEP responses.” 2010. Thesis, University of Nevada – Reno. Accessed March 07, 2021. http://hdl.handle.net/11714/4290.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

MLA Handbook (7^th Edition):

Highsmith, Jennifer R. “The effects of selective attention on chromatic processing; pattern-onset VEP responses.” 2010. Web. 07 Mar 2021.

Vancouver:

Highsmith JR. The effects of selective attention on chromatic processing; pattern-onset VEP responses. [Internet] [Thesis]. University of Nevada – Reno; 2010. [cited 2021 Mar 07]. Available from: http://hdl.handle.net/11714/4290.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Council of Science Editors:

Highsmith JR. The effects of selective attention on chromatic processing; pattern-onset VEP responses. [Thesis]. University of Nevada – Reno; 2010. Available from: http://hdl.handle.net/11714/4290

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Johannes Gutenberg Universität Mainz

19. Mühleib, Corinna. Elektrophysiologische Untersuchungen am experimentellen Autoimmun-Glaukom-Modell.

Degree: 2010, Johannes Gutenberg Universität Mainz

URL: http://ubm.opus.hbz-nrw.de/volltexte/2010/2345/

► Das Glaukom ist eine der führenden Erblindungsursachen weltweit. Trotzdem ist die Pathogenese, die zur Degeneration der retinalen Ganglienzellen führt, bisher nicht verstanden. In den letzten… (more)

▼ Das Glaukom ist eine der führenden Erblindungsursachen weltweit. Trotzdem ist die Pathogenese, die zur Degeneration der retinalen Ganglienzellen führt, bisher nicht verstanden. In den letzten Jahren ergaben sich verschiedene Hinweise auf die Beteiligung einer immunologischen Komponente. Thema dieser Arbeit waren elektrophysiologische Untersuchungen, im Sinne von visuell evozierten Potentialen, am Tiermodell des Experimentellen Autoimmun Glaukoms und die Etablierung dieses Modells. Das Modell basiert auf einer Immunisierung von Lewisratten mit Pertussistoxin, inkompletten Freunds Adjuvant und potentiellen Antigenen, die zu einer Immunreaktion und einem Verlust von retinalen Ganglienzellen führen sollen. Zur Etablierung des Experimentellen Autoimmun Glaukom Modells wurde eine fünfwöchige Studie mit vier Gruppen durchgeführt. Als Antigene wurden Glia fibrilläres saures Protein (n= 10) und Myelin basisches Protein (n=10) verwendet, die beide in Studien zu Serum- und Kammerwasseranalysen bei Glaukompatienten eine Abweichung zur Kontrollgruppe gezeigt hatten. Außerdem wurde eine Gruppe mit selbst hergestelltem Sehnerv-Homogenat (n=12) immunisiert. Eine Gruppe erhielt keine Immunisierung und diente als Kontrolle (n=10). Zur Überprüfung der Effekte des Modells dienten verschiedene Untersuchungsmethoden, wie die Augeninnendruckmessung und die Untersuchung der Fundi. Des Weiteren wurden transiente und stationäre visuell evozierte Potentiale abgeleitet und die Latenzen, Amplituden und die Marker S (Steigung) und TR (Temporale Antworten) verglichen. Außerdem erfolgte nach Tötung der Tiere die Entnahme der Gehirne und Augen. Die Gehirne wurden nach Paraffineinbettung geschnitten, mit Luxol Fast Blue und Kresylviolett gefärbt und hinsichtlich etwaiger Entmarkungsherde oder anderer Pathologien unter dem Mikroskop bewertet. Der Verlauf des intraokulären Drucks zeigte sowohl zwischen den Gruppen als auch zwischen den verschiedenen Zeitpunkten keine signifikanten Unterschiede. Er bewegte sich im physiologischen Bereich mit durchschnittlich circa 12 mmHg. Die Funduskopien lieferten zu keinem Zeitpunkt krankhafte Veränderungen. Auch die visuell evozierten Potentiale lieferten zwischen den Gruppen keine signifikanten Unterschiede, sondern belegten normale visuelle Funktion bei allen Tieren. Die Auswertung der histologischen Untersuchung der Hirnschnitte zeigte keine Entmarkungsherde. Die erzielten Ergebnisse dieser Arbeit legen nahe, dass der retinale Ganglienzellverlust beim Experimentellen Autoimmun Glaukom Modell ohne eine Augeninnendruckerhöhung stattfindet. Die Fundusuntersuchung und die visuell evozierten Potentiale, wie in diesem Versuchsaufbau durchgeführt, scheinen nicht sensibel genug zu sein, diese Verluste nachzuweisen. In weiteren Arbeiten sollten andere Methoden zum Nachweis der retinalen Ganglienzellverluste erprobt werden. Neben elektrophysiologischen Methoden bieten sich für das weitere Vorgehen besonders immunhistologische Methoden an. Außerdem sollten die Mechanismen erforscht werden durch die es nach der…

Subjects/Keywords: Experimentelles Autoimmun Glaukom; Visuell evozierte Potentiale; Ratte; Immunisierung; Glaukom; experimental autoimmune glaucoma; visual evoked potential; rat; immunization; glaucoma; Medical sciences Medicine

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APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6^th Edition):

Mühleib, C. (2010). Elektrophysiologische Untersuchungen am experimentellen Autoimmun-Glaukom-Modell. (Doctoral Dissertation). Johannes Gutenberg Universität Mainz. Retrieved from http://ubm.opus.hbz-nrw.de/volltexte/2010/2345/

Chicago Manual of Style (16^th Edition):

Mühleib, Corinna. “Elektrophysiologische Untersuchungen am experimentellen Autoimmun-Glaukom-Modell.” 2010. Doctoral Dissertation, Johannes Gutenberg Universität Mainz. Accessed March 07, 2021. http://ubm.opus.hbz-nrw.de/volltexte/2010/2345/.

MLA Handbook (7^th Edition):

Mühleib, Corinna. “Elektrophysiologische Untersuchungen am experimentellen Autoimmun-Glaukom-Modell.” 2010. Web. 07 Mar 2021.

Vancouver:

Mühleib C. Elektrophysiologische Untersuchungen am experimentellen Autoimmun-Glaukom-Modell. [Internet] [Doctoral dissertation]. Johannes Gutenberg Universität Mainz; 2010. [cited 2021 Mar 07]. Available from: http://ubm.opus.hbz-nrw.de/volltexte/2010/2345/.

Council of Science Editors:

Mühleib C. Elektrophysiologische Untersuchungen am experimentellen Autoimmun-Glaukom-Modell. [Doctoral Dissertation]. Johannes Gutenberg Universität Mainz; 2010. Available from: http://ubm.opus.hbz-nrw.de/volltexte/2010/2345/

University of Illinois – Urbana-Champaign

20. Yen, Sean Wayne. Stimulus intensity effects on the steady-state visual evoked potential.

Degree: MS, Electrical & Computer Engr, 2015, University of Illinois – Urbana-Champaign

URL: http://hdl.handle.net/2142/78410

► This research tests the hypothesis that the amplitude of the steady-state visual evoked potential (SSVEP), a neural response to repetitive visual stimuli, is positively correlated… (more)

Subjects/Keywords: steady-state visual evoked potential (SSVEP); stimulus intensity; brain-computer interfaces; brain-computer interfaces (BCIs); electroencephalography (EEG)

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APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6^th Edition):

Yen, S. W. (2015). Stimulus intensity effects on the steady-state visual evoked potential. (Thesis). University of Illinois – Urbana-Champaign. Retrieved from http://hdl.handle.net/2142/78410

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Chicago Manual of Style (16^th Edition):

Yen, Sean Wayne. “Stimulus intensity effects on the steady-state visual evoked potential.” 2015. Thesis, University of Illinois – Urbana-Champaign. Accessed March 07, 2021. http://hdl.handle.net/2142/78410.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

MLA Handbook (7^th Edition):

Yen, Sean Wayne. “Stimulus intensity effects on the steady-state visual evoked potential.” 2015. Web. 07 Mar 2021.

Vancouver:

Yen SW. Stimulus intensity effects on the steady-state visual evoked potential. [Internet] [Thesis]. University of Illinois – Urbana-Champaign; 2015. [cited 2021 Mar 07]. Available from: http://hdl.handle.net/2142/78410.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Council of Science Editors:

Yen SW. Stimulus intensity effects on the steady-state visual evoked potential. [Thesis]. University of Illinois – Urbana-Champaign; 2015. Available from: http://hdl.handle.net/2142/78410

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

University of Waterloo

21. Yadav, Naveen Kumar. Optimization of Sweep Visually Evoked Potential (sVEP) in Adults.

Degree: 2008, University of Waterloo

URL: http://hdl.handle.net/10012/3631

► Purpose and hypothesis: The purpose of this study was to optimize and standardize the following parameters of sweep Visually Evoked Potential (sVEP) in adults: criteria… (more)

▼ Purpose and hypothesis: The purpose of this study was to optimize and standardize the following parameters of sweep Visually Evoked Potential (sVEP) in adults: criteria for fitting the regression line to estimate threshold, luminance, electrode placement, temporal frequency, sweep direction, presence of fixation target and stimulus area. The hypothesis is that the parameters chosen will have an impact on the measured visual acuity, contrast threshold and on the number of viable sVEP plots. Methods: The Power Diva software, Version 1.9 was used for this study. Five gold cup active electrodes, one reference electrode and one ground electrode were used to measure the Electroencephalography (EEG) signals. Six adult participants (aged 17 to 35 years), with corrected to normal visual acuity and no history of ocular disease took part in each experiment, except for the repeatability experiment in which 3 subjects participated. Four criteria for regression line fitting were compared. Psychophysical thresholds were used to validate the sVEP measures for the different criterion and repeatability of sVEP was estimated for 10 sessions. The effect of luminance (25 cd/m2, 50 cd/m2, 100 cd/m2), electrode placement (Power Diva and ISCEV), temporal frequency (6 Hz, 7.5 Hz, 10 Hz), sweep direction, fixation target and stimulus area were investigated. A repeated measure ANOVA statistical method was used to analyze the average threshold and the number of viable plots out of five active channels for all subjects. Results: Criterion 2 and 3 gave better visual acuity, higher contrast sensitivity, better repeatability and gave results that were closer to the psychophysical threshold than criterion 0 and 1. Luminance of 25 cd/m2 gave significantly fewer viable readings than 50 and 100 cd/m2 while measuring visual acuity (F = 5.11, df = 2, p = 0.0295). Temporal frequency of 7.5 Hz gave significantly more viable readings than 6 and 10 Hz while measuring visual acuity (F = 50.53, df = 2, p < 0.0001) and contrast threshold (F = 9.87, df = 2,p = 0.0043). There was a highly significant interaction of criterion with temporal frequency (F = 1536.98, df = 6, p < 0.0001) while measuring contrast threshold. There was a significant interaction of criterion with sweep direction (F = 4.26, df = 3, p = 0.0231) and for the number of readings (F = 3.75, df = 3, p = 0.0343) while measuring visual acuity. There was an interaction of criterion with sweep direction (F = 4.97, df = 3, p = 0.0136) while measuring contrast threshold at a spatial frequency of 1 cpd. There was a significant effect of fixation target (F = 7.64, df = 1, p = 0.0396) while measuring visual acuity. There was a significant effect of stimulus area (F = 11.78, df = 4, p < 0.0001) on the number of readings while measuring contrast threshold. Conclusion: The sVEP parameters chosen do have a significant effect on visual acuity, contrast threshold and on the number of viable readings. The following parameters are recommended in adults on the basis of results; Criterion 2 or 3 for…

Subjects/Keywords: Visually Evoked Potential; Visual acuity; Contrast threshold; VEP

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APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6^th Edition):

Yadav, N. K. (2008). Optimization of Sweep Visually Evoked Potential (sVEP) in Adults. (Thesis). University of Waterloo. Retrieved from http://hdl.handle.net/10012/3631

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Chicago Manual of Style (16^th Edition):

Yadav, Naveen Kumar. “Optimization of Sweep Visually Evoked Potential (sVEP) in Adults.” 2008. Thesis, University of Waterloo. Accessed March 07, 2021. http://hdl.handle.net/10012/3631.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

MLA Handbook (7^th Edition):

Yadav, Naveen Kumar. “Optimization of Sweep Visually Evoked Potential (sVEP) in Adults.” 2008. Web. 07 Mar 2021.

Vancouver:

Yadav NK. Optimization of Sweep Visually Evoked Potential (sVEP) in Adults. [Internet] [Thesis]. University of Waterloo; 2008. [cited 2021 Mar 07]. Available from: http://hdl.handle.net/10012/3631.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Council of Science Editors:

Yadav NK. Optimization of Sweep Visually Evoked Potential (sVEP) in Adults. [Thesis]. University of Waterloo; 2008. Available from: http://hdl.handle.net/10012/3631

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

22. Waytowich, Nicholas R. Development of a Practical Visual-Evoked Potential-Based Brain-Computer Interface.

Degree: PhD, Biomedical Engineering, 2015, Old Dominion University

URL: 9781321840704 ; https://digitalcommons.odu.edu/biomedengineering_etds/6

► There are many different neuromuscular disorders that disrupt the normal communication pathways between the brain and the rest of the body. These diseases often… (more)

Subjects/Keywords: Assistive devices; Augmentative communication; Brain-computer interface (BCI); EEG; Visual Evoked Potential (VEP); Biomedical Engineering and Bioengineering; Neuroscience and Neurobiology

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APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6^th Edition):

Waytowich, N. R. (2015). Development of a Practical Visual-Evoked Potential-Based Brain-Computer Interface. (Doctoral Dissertation). Old Dominion University. Retrieved from 9781321840704 ; https://digitalcommons.odu.edu/biomedengineering_etds/6

Chicago Manual of Style (16^th Edition):

Waytowich, Nicholas R. “Development of a Practical Visual-Evoked Potential-Based Brain-Computer Interface.” 2015. Doctoral Dissertation, Old Dominion University. Accessed March 07, 2021. 9781321840704 ; https://digitalcommons.odu.edu/biomedengineering_etds/6.

MLA Handbook (7^th Edition):

Waytowich, Nicholas R. “Development of a Practical Visual-Evoked Potential-Based Brain-Computer Interface.” 2015. Web. 07 Mar 2021.

Vancouver:

Waytowich NR. Development of a Practical Visual-Evoked Potential-Based Brain-Computer Interface. [Internet] [Doctoral dissertation]. Old Dominion University; 2015. [cited 2021 Mar 07]. Available from: 9781321840704 ; https://digitalcommons.odu.edu/biomedengineering_etds/6.

Council of Science Editors:

Waytowich NR. Development of a Practical Visual-Evoked Potential-Based Brain-Computer Interface. [Doctoral Dissertation]. Old Dominion University; 2015. Available from: 9781321840704 ; https://digitalcommons.odu.edu/biomedengineering_etds/6

University of New South Wales

23. Aldahlawi, Nada Hussein. Optimizing the steady-state multifocal visual evoked potential.

Degree: Optometry & Vision Science, 2009, University of New South Wales

URL: http://handle.unsw.edu.au/1959.4/45105 ; https://unsworks.unsw.edu.au/fapi/datastream/unsworks:8400/SOURCE01?view=true

► Aims: The multi focal Visual Evoked Potential (mfVEP) is used in clinical diagnosis and basic research. Employing steady-state stimuli rather than the usual m-sequence stimuli… (more)

▼ Aims: The multi focal Visual Evoked Potential (mfVEP) is used in clinical diagnosis and basic research. Employing steady-state stimuli rather than the usual m-sequence stimuli may simplify statistical evaluation and reduce examination durations. This study aims to optimise performance (SNR) of the steady-state multi focal visual evoked potential (ssmfVEP) by examining stimulus characteristics such as size and the use of sparse stimuli.Methods: Normal adult human subjects (aged 18-60 years, n=41) were examined. SsmfVEPs using horizontal oriented sinusoidal luminance profile gratings were compared with conventional m-sequence mfVEP. In experiment one, stimuli at 48% contrast were modulated simultaneously in either 9 or 17 visual field regions comprising three rings presented at viewing distances of 16, 32 and 128cm. In experiment two, stimuli at 97% contrast were in two concentric regions, subdivided into quadrants and their SNR assessed for sparse and full field presentations. Three evoked potential channels were recorded, and three derived Lp-norm channels were calculated from them and assessed for efficient pooling.Results: In experiment one, SNR was significantly larger for m-sequence mfVEPs than for ssmNEP in all six channels. There was no effect of viewing distance for both ssmfVEPs and m-sequence mfVEPs. The larger regions (9 regions) gave larger responses than the small ones (17 regions). In experiment two, increasing both the number of concurrently stimulated regions and their proximity was associated with increased SNR. In both experiments, the norm channels gave the largest responses, indicating pooling was achieved.Conclusions: In normals, SNR of the ssmfVEP was unaffected by viewing distance and not improved by sparse stimulation. SNR was improved by increasing stimuli size. Future studies in glaucoma patients would be useful. The major findings provided evidence spatial summation occurred for all stimulus regions as the response increased as a function of increasing the number of concurrently stimulated regions, and that the degree of brain folding was similar for the three viewing distances. Conventional mfVEPs gave higher absolute SNR but lower SNR per unit time than ssmfVEPs in this study. The norm channels were more efficient than the individual channels.

Subjects/Keywords: SNR,; Visual evoked potential,; Glaucoma,; Thesis Digitisation Program

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APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6^th Edition):

Aldahlawi, N. H. (2009). Optimizing the steady-state multifocal visual evoked potential. (Masters Thesis). University of New South Wales. Retrieved from http://handle.unsw.edu.au/1959.4/45105 ; https://unsworks.unsw.edu.au/fapi/datastream/unsworks:8400/SOURCE01?view=true

Chicago Manual of Style (16^th Edition):

Aldahlawi, Nada Hussein. “Optimizing the steady-state multifocal visual evoked potential.” 2009. Masters Thesis, University of New South Wales. Accessed March 07, 2021. http://handle.unsw.edu.au/1959.4/45105 ; https://unsworks.unsw.edu.au/fapi/datastream/unsworks:8400/SOURCE01?view=true.

MLA Handbook (7^th Edition):

Aldahlawi, Nada Hussein. “Optimizing the steady-state multifocal visual evoked potential.” 2009. Web. 07 Mar 2021.

Vancouver:

Aldahlawi NH. Optimizing the steady-state multifocal visual evoked potential. [Internet] [Masters thesis]. University of New South Wales; 2009. [cited 2021 Mar 07]. Available from: http://handle.unsw.edu.au/1959.4/45105 ; https://unsworks.unsw.edu.au/fapi/datastream/unsworks:8400/SOURCE01?view=true.

Council of Science Editors:

Aldahlawi NH. Optimizing the steady-state multifocal visual evoked potential. [Masters Thesis]. University of New South Wales; 2009. Available from: http://handle.unsw.edu.au/1959.4/45105 ; https://unsworks.unsw.edu.au/fapi/datastream/unsworks:8400/SOURCE01?view=true

University of Kansas

24. Pitt, Kevin Michael. Evaluating Person-Centered Factors Associated with Brain-Computer Interface Access to a Commercial Augmentative and Alternative Communication Device.

Degree: PhD, Hearing and Speech, 2019, University of Kansas

URL: http://hdl.handle.net/1808/31346

► Purpose: Brain-computer interface (BCI) techniques may provide a link between an individual’s neurological activity and communication device control, which circumvents the requirement for individuals to… (more)

▼ Purpose: Brain-computer interface (BCI) techniques may provide a link between an individual’s neurological activity and communication device control, which circumvents the requirement for individuals to possess a reliable form of physical movement for augmentative and alternative communication (AAC) device access. However, while BCI technology is rapidly progressing in the laboratory setting, BCI developments are advancing largely without consideration of established AAC best practices, which are crucial for effective clinical implementation of BCI technology. For instance, BCI research largely utilize custom made software and display paradigms and view BCI as a ‘one size fits all’ solution. That BCI is a one size fits all solution contrasts with AAC best practice, which seek to pair an individual to an AAC device that matches their current and future profile, communication needs, and preferences. Therefore, to bring BCI research further in line with existing AAC best practices this dissertation work aims to evaluate initial and recurring person-centered factors associated with learning of motor execution-based BCI switch for accessing a commercial AAC row-column scanning paradigm. Method: Four individuals with a diagnosis of amyotrophic lateral sclerosis (ALS) completed 12 BCI training sessions in which they made letter selections during an automatic row-column scanning pattern from a 7x5 grid. Neural signals utilized for BCI selection control were generated by motor execution during target letter highlighting. For comparison, three individuals without neurological impairment completed three BCI training sessions. During each session, participants completed approximately 20 minutes of online BCI. To assess person-centered factors associated with BCI performance and longitudinal device learning, participants completed both initial and recurring assessment measures. Initial assessment measures of an individual’s unique profile prior to BCI training included evaluation of neural signals utilized for BCI control (i.e., maximum event related synchronization amplitude (ERS), maximum event related synchronization amplitude minus predicted noise floor, and event related synchronization minus desynchronization difference; ERS-ERD), along with screening of cognitive factors, physical motor abilities, and motor imagery skills via the ALS-Cognitive Behavioral Screen, BCI screener (Pitt & Brumberg, 2018b), ALS-Functional Rating Scale, Bimanual Fine Motor Function, and Manual Ability Classification System. Recurring measures were taken during each BCI training session to evaluate changes associated with longitudinal BCI performance, and included measures of fatigue, motivation, time since last meal, device satisfaction, level of frustration with device control, mental and physical effort, and overall ease of device control. Results: Three out of four participants demonstrated either BCI performance in the range of neurotypical peers, or an improving BCI learning trajectory across sessions. However, while BCI learning trajectories… Advisors/Committee Members: Brumberg, Jonathan (advisor), Brumberg, Jonathan (cmtemember), Storkel, Holly (cmtemember), Brady, Nancy (cmtemember), Heidrick, Lindsey (cmtemember), Fiorentino, Robert (cmtemember).

Subjects/Keywords: Speech therapy; Augmentative and Alternative Communication; Brain Computer Interface; Motor Imagery; P300; Steady State Visual Evoked Potential; Translation

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APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6^th Edition):

Pitt, K. M. (2019). Evaluating Person-Centered Factors Associated with Brain-Computer Interface Access to a Commercial Augmentative and Alternative Communication Device. (Doctoral Dissertation). University of Kansas. Retrieved from http://hdl.handle.net/1808/31346

Chicago Manual of Style (16^th Edition):

Pitt, Kevin Michael. “Evaluating Person-Centered Factors Associated with Brain-Computer Interface Access to a Commercial Augmentative and Alternative Communication Device.” 2019. Doctoral Dissertation, University of Kansas. Accessed March 07, 2021. http://hdl.handle.net/1808/31346.

MLA Handbook (7^th Edition):

Pitt, Kevin Michael. “Evaluating Person-Centered Factors Associated with Brain-Computer Interface Access to a Commercial Augmentative and Alternative Communication Device.” 2019. Web. 07 Mar 2021.

Vancouver:

Pitt KM. Evaluating Person-Centered Factors Associated with Brain-Computer Interface Access to a Commercial Augmentative and Alternative Communication Device. [Internet] [Doctoral dissertation]. University of Kansas; 2019. [cited 2021 Mar 07]. Available from: http://hdl.handle.net/1808/31346.

Council of Science Editors:

Pitt KM. Evaluating Person-Centered Factors Associated with Brain-Computer Interface Access to a Commercial Augmentative and Alternative Communication Device. [Doctoral Dissertation]. University of Kansas; 2019. Available from: http://hdl.handle.net/1808/31346

25. França, Valtenice de Cássia Rodrigues de Matos. Avaliação da acuidade visual de recém-nascidos pequenos para a idade gestacional pelos métodos do potencial visual evocado de varredura e cartões de acuidade de Teller.

Degree: Mestrado, Psicologia Experimental, 2008, University of São Paulo

URL: http://www.teses.usp.br/teses/disponiveis/47/47132/tde-29072009-152432/ ;

► Objetivo: Avaliar os efeitos da desnutrição intra-uterina na acuidade visual (AV) de resolução de grades pelo Potencial Visual Evocado de Varredura (PVEv) e Cartões de… (more)

▼ Objetivo: Avaliar os efeitos da desnutrição intra-uterina na acuidade visual (AV) de resolução de grades pelo Potencial Visual Evocado de Varredura (PVEv) e Cartões de Acuidade de Teller (CAT). Método: Avaliamos a AV de resolução de grades, binocularmente, de 41 recém-nascidos com idade estacional 37 semanas, destes 23 nasceram com o peso adequado para a idade gestacional (AIG - Idade: 14,3 ± 7,5 semanas) e 18 nasceram pequenos para a idade gestacional (PIG - Idade: 10,7 ± 4,1semanas). A AV foi determinada usando ambas as técnicas psicofísica (CAT) e eletrofisiológica (PVEv). Durante o teste dos CAT foram apresentados cartões contendo em um dos lados grades de ondas quadradas pretas e brancas com freqüência espacial entre 0,23 e 19 ciclos por grau de ângulo visual a 55 cm do participante. O teste iniciou com o cartão com a freqüência espacial mais baixa com orientação randômica desconhecida pelo experimentador. Cartões contendo freqüências espaciais mais altas foram apresentados gradativamente até que uma resposta incorreta ocorresse, então o cartão anterior era apresentado novamente. A AV foi definida pela média aritmética das freqüências espaciais contidas nos cartões para 4 reversões. Para o registro do PVEv, o sistema PowerDiva (Brosnahan et al., 1998) foi usado para gerar todos os estímulos e analisar as repostas provocadas. Estímulos de grades senoidais em reversão de fase em 3, 6 ou 10 Hz foram apresentados em monitor de vídeo monocromático de 21 polegadas com luminância média de 161,13 cd/m2. Registramos o eletroencefalograma com três eletrodos ativos (O1, Oz, O2) relacionados ao eletrodo de referência no vertex. Durante cada tentativa com duração de 10 segundos, resentávamos uma faixa de freqüência espacial que aumentava linearmente. Para cada condição (freqüência temporal - FT) foram usadas no mínimo três tentativas para estimar o limiar. Consideramos o canal que registrou a AV mais alta com boa razão sinal-ruído (SNR>3:1), fase constante e critério estatístico. Resultados: Não encontramos diferenças significativas na AV entre os grupos para nenhum dos métodos. Para o PVEv, não encontramos diferenças significativas na AV, amplitude, ruído ou SNR entre os grupos para nenhuma das FT. Análises intra-grupos mostraram que os valores de amplitude, SNR e ruído foram significativamente diferentes entre as freqüências temporais apenas para os PIG. Entretanto, os PIG até 8 semanas de idade mostraram uma tendência para amplitudes e SNR mais altas para a FT de 3 Hz comparadas aos AIG. Esses mesmos PIG mostraram uma tendência para valores de fase maiores respostas lentas) em comparação aos AIG. Entretanto, a taxa de desenvolvimento da fase foi maior para os PIG do que para os AIG em todas as FT. Conclusão. Não há alteração significativa na AV de recém-nascidos PIG, entretanto as informações de medidas supra-limiares são consistentes com a hipótese que a desnutrição intra-uterina torna as respostas visuais mais lentas entre a retina e o córtex visual. Os dados também sugerem de forma sutil que tais efeitos são… Advisors/Committee Members: Costa, Marcelo Fernandes da.

Subjects/Keywords: Acuidade visual; Cartões de acuidade de Teller; Desnutrição fetal; Fetal malnutrition; Neonates; Potenciais visuais evocados; Recém-nascidos; Teller Acuity Cards; Visual acuity; Visual Evoked Potential

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APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6^th Edition):

França, V. d. C. R. d. M. (2008). Avaliação da acuidade visual de recém-nascidos pequenos para a idade gestacional pelos métodos do potencial visual evocado de varredura e cartões de acuidade de Teller. (Masters Thesis). University of São Paulo. Retrieved from http://www.teses.usp.br/teses/disponiveis/47/47132/tde-29072009-152432/ ;

Chicago Manual of Style (16^th Edition):

França, Valtenice de Cássia Rodrigues de Matos. “Avaliação da acuidade visual de recém-nascidos pequenos para a idade gestacional pelos métodos do potencial visual evocado de varredura e cartões de acuidade de Teller.” 2008. Masters Thesis, University of São Paulo. Accessed March 07, 2021. http://www.teses.usp.br/teses/disponiveis/47/47132/tde-29072009-152432/ ;.

MLA Handbook (7^th Edition):

França, Valtenice de Cássia Rodrigues de Matos. “Avaliação da acuidade visual de recém-nascidos pequenos para a idade gestacional pelos métodos do potencial visual evocado de varredura e cartões de acuidade de Teller.” 2008. Web. 07 Mar 2021.

Vancouver:

França VdCRdM. Avaliação da acuidade visual de recém-nascidos pequenos para a idade gestacional pelos métodos do potencial visual evocado de varredura e cartões de acuidade de Teller. [Internet] [Masters thesis]. University of São Paulo; 2008. [cited 2021 Mar 07]. Available from: http://www.teses.usp.br/teses/disponiveis/47/47132/tde-29072009-152432/ ;.

Council of Science Editors:

França VdCRdM. Avaliação da acuidade visual de recém-nascidos pequenos para a idade gestacional pelos métodos do potencial visual evocado de varredura e cartões de acuidade de Teller. [Masters Thesis]. University of São Paulo; 2008. Available from: http://www.teses.usp.br/teses/disponiveis/47/47132/tde-29072009-152432/ ;

University of Gothenburg / Göteborgs Universitet

26. Raffa, Lina. Visual Function, Ocular Morphology and Growth – Children Born Moderate-to-Late Preterm.

Degree: 2016, University of Gothenburg / Göteborgs Universitet

URL: http://hdl.handle.net/2077/44854

► Introduction: In the past, researchers have closely studied both systemic and ophthalmological complications associated with extreme preterm birth. Moderate-to-late preterm (MLP) infants have become the… (more)

▼ Introduction: In the past, researchers have closely studied both systemic and ophthalmological complications associated with extreme preterm birth. Moderate-to-late preterm (MLP) infants have become the fastest-growing subgroup of preterm infants in the last decade, accounting for 84% of all preterm births. Evidence is currently emerging that even near-term birth predisposes those children to a higher risk of mortality and morbidity than term infants. Effects of extreme prematurity on ocular development are known to include retinopathy of prematurity (ROP), refractive errors, strabismus, low visual performance, decreased contrast sensitivity, visual field defects, colour vision deficits, and abnormal cognitive development. To date, very few studies have focused on the ophthalmological aspects of this particular subset of MLP children. The aim of the project was to investigate the development of ocular morphology and visual function in children born MLP, relating them to auxological data and comparing them with their full-term counterparts. Methods: In a prospective population-based study conducted in 2002-2004, 247 potentially eligible children (110 girls and 137 boys) born MLP (gestational age (GA) 32-36 weeks) participated in the neonatal study. None of the participating children had a previous history of ROP. At 5, 8 and 12 years of age, 78, 50 and 22 children respectively who were still included in the study took part in sub-studies that focused on orthoptic evaluation, ocular morphology/visual function and electrophysiology in relation to auxological data in both MLP and sex- and age-matched controls. Results: Based on our findings, being MLP born is associated with increased ocular morbidity and may require greater ophthalmic surveillance than full-term counterparts. Auxological data at birth, especially birth weight, seems to be an important risk indicator when establishing an ophthalmological diagnosis in preschool MLP children and visual acuity outcome was positively correlated to GA. Good catch-up growth favoured proper development of ocular growth and morphology. Our results show that macular morphology, visual evoked potential (VEP) and full-field electroretinography (ff-ERG) responses are also affected in the MLP group at 12 years of age. Conclusion: It has been confirmed in our study that preterm birth, even just in the moderate to late phase, represents a continuum of risks associated with visual system morbidities. These findings have potentially important implications for the follow-up of premature children and therefore require confirmation in large population-based studies that encompass these MLP premature children.

Subjects/Keywords: Auxological data; Electroretinography; IGF-I; Moderate-to-late preterm; Ocular growth; Optical coherence tomography; Retinal nerve fiber layer; Visual evoked potential; Visual function

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APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6^th Edition):

Raffa, L. (2016). Visual Function, Ocular Morphology and Growth – Children Born Moderate-to-Late Preterm. (Thesis). University of Gothenburg / Göteborgs Universitet. Retrieved from http://hdl.handle.net/2077/44854

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Chicago Manual of Style (16^th Edition):

Raffa, Lina. “Visual Function, Ocular Morphology and Growth – Children Born Moderate-to-Late Preterm.” 2016. Thesis, University of Gothenburg / Göteborgs Universitet. Accessed March 07, 2021. http://hdl.handle.net/2077/44854.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

MLA Handbook (7^th Edition):

Raffa, Lina. “Visual Function, Ocular Morphology and Growth – Children Born Moderate-to-Late Preterm.” 2016. Web. 07 Mar 2021.

Vancouver:

Raffa L. Visual Function, Ocular Morphology and Growth – Children Born Moderate-to-Late Preterm. [Internet] [Thesis]. University of Gothenburg / Göteborgs Universitet; 2016. [cited 2021 Mar 07]. Available from: http://hdl.handle.net/2077/44854.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Council of Science Editors:

Raffa L. Visual Function, Ocular Morphology and Growth – Children Born Moderate-to-Late Preterm. [Thesis]. University of Gothenburg / Göteborgs Universitet; 2016. Available from: http://hdl.handle.net/2077/44854

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

University of New South Wales

27. Siu, Timothy Lok Tin. Artificial vision: feasibility of an episcleral retinal prosthesis & implications of neuroplasticity.

Degree: Medical Sciences, 2009, University of New South Wales

URL: http://handle.unsw.edu.au/1959.4/42879 ; https://unsworks.unsw.edu.au/fapi/datastream/unsworks:6853/SOURCE02?view=true

► Background. A visual prosthesis is a conceptual device designed to activate residual functional neurons in the visual pathway of blind individuals to produce artificial vision.… (more)

▼ Background. A visual prosthesis is a conceptual device designed to activate residual functional neurons in the visual pathway of blind individuals to produce artificial vision. Such device, when applied to stimulate the vitreous surface of the retina, has proven feasible in producing patterned light perception in blind individuals suffering from dystrophic diseases of the retina, such as aged-related macular degeneration (AMD). However the practicality of such approach has been challenged by the difficulty of surgical access and the risks of damaging the neuroretina. Positioning a visual implant over the scleral surface of the eye could present a safer alternative but this stimulation modality has not been tested in diseased retinas. Additionally, recent research has shown that the adult neocortex retains substantial plasticity following a disruption to its visual input and the potential deterioration in visual capabilities as a result of such experience modification may undermine the overall bionic rescue strategy.Methods. Two animal models mimicking the principal pathologies found in AMD, namely photoreceptor degeneration and reduced retinal ganglion cell mass, were used to evaluate the efficacy of trans-scleral stimulation of the retina by recording electrical evoked potentials in the visual cortex. The visual performance following the loss of pattern vision induced by bilateral eyelid suturing in adult mice was examined by analysing visual evoked potentials.Findings. Spatially differentiated cortical activations were obtained notwithstanding the underlying retinopathy in the experiment animals. The charge density thresholds were found to be similar to controls and below the bioelectric safety limit. After prolonged visual deprivation (weeks) in the mouse, the visual cortical responses evoked by either electrical or photic stimuli were both significantly reduced. An assessment of different visual capabilities using patterned stimuli demonstrated that whilst visual acuity and motion sensitivity were preserved, significant depression in luminance and contrast sensitivities was detected.Conclusion. Trans-scleral stimulation of the retina is a feasible approach for the development of a visual prosthesis. Following visual loss the adult brain exhibits significant experience-dependent modifications. These new insights may force a revision on the current bionic rescue strategy. Advisors/Committee Members: Morley, John, Medical Sciences, Faculty of Medicine, UNSW, Vickery, Richard, Medical Sciences, Faculty of Medicine, UNSW.

Subjects/Keywords: Evoked potential; Visual prosthesis; Neural plasticity; Visual deprivation; Rabbit; Mouse

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APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6^th Edition):

Siu, T. L. T. (2009). Artificial vision: feasibility of an episcleral retinal prosthesis & implications of neuroplasticity. (Doctoral Dissertation). University of New South Wales. Retrieved from http://handle.unsw.edu.au/1959.4/42879 ; https://unsworks.unsw.edu.au/fapi/datastream/unsworks:6853/SOURCE02?view=true

Chicago Manual of Style (16^th Edition):

Siu, Timothy Lok Tin. “Artificial vision: feasibility of an episcleral retinal prosthesis & implications of neuroplasticity.” 2009. Doctoral Dissertation, University of New South Wales. Accessed March 07, 2021. http://handle.unsw.edu.au/1959.4/42879 ; https://unsworks.unsw.edu.au/fapi/datastream/unsworks:6853/SOURCE02?view=true.

MLA Handbook (7^th Edition):

Siu, Timothy Lok Tin. “Artificial vision: feasibility of an episcleral retinal prosthesis & implications of neuroplasticity.” 2009. Web. 07 Mar 2021.

Vancouver:

Siu TLT. Artificial vision: feasibility of an episcleral retinal prosthesis & implications of neuroplasticity. [Internet] [Doctoral dissertation]. University of New South Wales; 2009. [cited 2021 Mar 07]. Available from: http://handle.unsw.edu.au/1959.4/42879 ; https://unsworks.unsw.edu.au/fapi/datastream/unsworks:6853/SOURCE02?view=true.

Council of Science Editors:

Siu TLT. Artificial vision: feasibility of an episcleral retinal prosthesis & implications of neuroplasticity. [Doctoral Dissertation]. University of New South Wales; 2009. Available from: http://handle.unsw.edu.au/1959.4/42879 ; https://unsworks.unsw.edu.au/fapi/datastream/unsworks:6853/SOURCE02?view=true

28. Costa, Marcelo Fernandes da. Acuidade visual de resolução de grades em crianças com paralisia cerebral do tipo espástico pelo método dos potenciais visuais evocados de varredura.

Degree: Mestrado, Neurociências e Comportamento, 2001, University of São Paulo

URL: http://www.teses.usp.br/teses/disponiveis/47/47135/tde-18092006-155509/ ;

►

Medimos a acuidade visual em crianças com paralisia cerebral do tipo espástica, classificadas em tetraplégicas, diplégicas e hemiplégicas, de acordo com o seu prejuízo motor,… (more)

Subjects/Keywords: acuidade visual; cerebral palsy; desenvolvimento visual; paralisia cerebral; potencial visual evocado de varredura; sweep visual evoked potential; visual acuity; visual development

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APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6^th Edition):

Costa, M. F. d. (2001). Acuidade visual de resolução de grades em crianças com paralisia cerebral do tipo espástico pelo método dos potenciais visuais evocados de varredura. (Masters Thesis). University of São Paulo. Retrieved from http://www.teses.usp.br/teses/disponiveis/47/47135/tde-18092006-155509/ ;

Chicago Manual of Style (16^th Edition):

Costa, Marcelo Fernandes da. “Acuidade visual de resolução de grades em crianças com paralisia cerebral do tipo espástico pelo método dos potenciais visuais evocados de varredura.” 2001. Masters Thesis, University of São Paulo. Accessed March 07, 2021. http://www.teses.usp.br/teses/disponiveis/47/47135/tde-18092006-155509/ ;.

MLA Handbook (7^th Edition):

Costa, Marcelo Fernandes da. “Acuidade visual de resolução de grades em crianças com paralisia cerebral do tipo espástico pelo método dos potenciais visuais evocados de varredura.” 2001. Web. 07 Mar 2021.

Vancouver:

Costa MFd. Acuidade visual de resolução de grades em crianças com paralisia cerebral do tipo espástico pelo método dos potenciais visuais evocados de varredura. [Internet] [Masters thesis]. University of São Paulo; 2001. [cited 2021 Mar 07]. Available from: http://www.teses.usp.br/teses/disponiveis/47/47135/tde-18092006-155509/ ;.

Council of Science Editors:

Costa MFd. Acuidade visual de resolução de grades em crianças com paralisia cerebral do tipo espástico pelo método dos potenciais visuais evocados de varredura. [Masters Thesis]. University of São Paulo; 2001. Available from: http://www.teses.usp.br/teses/disponiveis/47/47135/tde-18092006-155509/ ;

University of Toronto

29. McFarlane, Michelle. Poor Glycemic Control is Associated with Neuroretinal Dysfunction in Short-wavelength Cone Pathways of Adolescents with Type 1 Diabetes.

Degree: 2010, University of Toronto

URL: http://hdl.handle.net/1807/25855

►

Studies demonstrate short-wavelength cone pathway dysfunction in patients with diabetes and no clinically visible DR. Poor glycemic control, as measured by hemoglobin A1c (HbA1c), is… (more)

Subjects/Keywords: type 1 diabetes; adolescents; diabetic retinopathy; short-wavelength; S-cone; visual evoked potential; electroretinogram; photopic negative response; hemoglobin A1c; glycemic control; 0381

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APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6^th Edition):

McFarlane, M. (2010). Poor Glycemic Control is Associated with Neuroretinal Dysfunction in Short-wavelength Cone Pathways of Adolescents with Type 1 Diabetes. (Masters Thesis). University of Toronto. Retrieved from http://hdl.handle.net/1807/25855

Chicago Manual of Style (16^th Edition):

McFarlane, Michelle. “Poor Glycemic Control is Associated with Neuroretinal Dysfunction in Short-wavelength Cone Pathways of Adolescents with Type 1 Diabetes.” 2010. Masters Thesis, University of Toronto. Accessed March 07, 2021. http://hdl.handle.net/1807/25855.

MLA Handbook (7^th Edition):

McFarlane, Michelle. “Poor Glycemic Control is Associated with Neuroretinal Dysfunction in Short-wavelength Cone Pathways of Adolescents with Type 1 Diabetes.” 2010. Web. 07 Mar 2021.

Vancouver:

McFarlane M. Poor Glycemic Control is Associated with Neuroretinal Dysfunction in Short-wavelength Cone Pathways of Adolescents with Type 1 Diabetes. [Internet] [Masters thesis]. University of Toronto; 2010. [cited 2021 Mar 07]. Available from: http://hdl.handle.net/1807/25855.

Council of Science Editors:

McFarlane M. Poor Glycemic Control is Associated with Neuroretinal Dysfunction in Short-wavelength Cone Pathways of Adolescents with Type 1 Diabetes. [Masters Thesis]. University of Toronto; 2010. Available from: http://hdl.handle.net/1807/25855

University of Plymouth

30. Dixon, Thomas Oliver. An electrophysiological examination of visuomotor activity elicited by visual object affordances.

Degree: PhD, 2016, University of Plymouth

URL: http://hdl.handle.net/10026.1/6758

► A wide literature of predominantly behavioural experiments that use Stimulus Response Compatibility (SRC) have suggested that visual action information such as object affordance yields rapid… (more)

▼ A wide literature of predominantly behavioural experiments that use Stimulus Response Compatibility (SRC) have suggested that visual action information such as object affordance yields rapid and concurrent activation of visual and motor brain areas, but has rarely provided direct evidence for this proposition. This thesis examines some of the key claims from the affordance literature by applying electrophysiological measures to well established SRC procedures to determine the verities of the behavioural claims of rapid and automatic visuomotor activation evoked by viewing affording objects. The temporal sensitivity offered by the Lateralised Readiness Potential and by visual evoked potentials P1 and N1 made ideal candidates to assess the behavioural claims of rapid visuomotor activation by seen objects by examining the timecourse of neural activation elicited by viewing affording objects under various conditions. The experimental work in this thesis broadly confirms the claims of the behavioural literature however it also found a series of novel results that are not predicted by the behavioural literature due to limitations in reaction time measures. For example, while different classes of affordance have been shown to exert the same behavioural facilitation, electrophysiological measures reveal very different patterns of cortical activation for grip-type and lateralised affordances. These novel findings question the applicability of the label ‘visuomotor’ to grip-type affordance processing and suggest considerable revision to models of affordance. This thesis also offers a series of novel and surprising insights into the ability to dissociate afforded motor activity from behavioural output, into the relationship between affordance and early visual evoked potentials, and into affordance in the absence of the intention to act. Overall, this thesis provides detailed suggestions for considerable changes to current models of the neural activity underpinning object affordance.

Subjects/Keywords: 616.8; Affordance; visuomotor; Electroencephalography; EEG; Vision for action; Embodied Cognition; embodiment; embodied; cognitive neuroscience; cognitive; cognitive psychology; psychology; electrophysiology; affordance; object; stimulus response compatibility; compatibility effect; intentional action; absence of intention; compatibility; go; no go; backward mask; consecutive object presentation; p1; n1; visual; motor; lateralised readiness potential; LRP; grip; grasp; grip type; power grip; precision grip; visual evoked potential

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APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6^th Edition):

Dixon, T. O. (2016). An electrophysiological examination of visuomotor activity elicited by visual object affordances. (Doctoral Dissertation). University of Plymouth. Retrieved from http://hdl.handle.net/10026.1/6758

Chicago Manual of Style (16^th Edition):

Dixon, Thomas Oliver. “An electrophysiological examination of visuomotor activity elicited by visual object affordances.” 2016. Doctoral Dissertation, University of Plymouth. Accessed March 07, 2021. http://hdl.handle.net/10026.1/6758.

MLA Handbook (7^th Edition):

Dixon, Thomas Oliver. “An electrophysiological examination of visuomotor activity elicited by visual object affordances.” 2016. Web. 07 Mar 2021.

Vancouver:

Dixon TO. An electrophysiological examination of visuomotor activity elicited by visual object affordances. [Internet] [Doctoral dissertation]. University of Plymouth; 2016. [cited 2021 Mar 07]. Available from: http://hdl.handle.net/10026.1/6758.

Council of Science Editors:

Dixon TO. An electrophysiological examination of visuomotor activity elicited by visual object affordances. [Doctoral Dissertation]. University of Plymouth; 2016. Available from: http://hdl.handle.net/10026.1/6758

Open Access Theses and Dissertations