subject:(muscle synergy)

New Jersey Institute of Technology

1. Wei, Yifei. Comparison of muscle synergies elicited from transcranial meganetic stimulation (tms) and voluntary movements.

Degree: MSin Biomedical Engineering - (M.S.), Biomedical Engineering, 2016, New Jersey Institute of Technology

URL: https://digitalcommons.njit.edu/theses/291

► A key question in motor control is the redundancy of musculoskeletal elements involved. This problem refers to as the degree of freedom problem. The… (more)

▼ A key question in motor control is the redundancy of musculoskeletal elements involved. This problem refers to as the degree of freedom problem. The Muscle Synergy Hypothesis is one of the hypotheses that aim to resolve the problem which defines that a muscle synergy is a combination of a small set of muscles activated at different levels, serving as a building block that constructs motor behaviors. A recent study (Overduin et al. 2012) demonstrated that muscle synergies decomposed by Nonnegative Matrix Factorization (NMF) from EMG patterns evoked by intra-cortical microsimulation (ICMS) in the monkey remarkably matched ones observed in naturalistic reach-and-grasp behaviors. Another study (Ajiboye et al. 2009) showed that synergies elicited from a small number of hand postures can allow prediction of hand postures in general. Inspired by aforementioned studies, the aim of this study was to investigate whether Transcranial Magnetic Stimulation (TMS) can elicit muscle synergies matching ones observed in voluntary movements in healthy human subjects and whether these synergies can serve as frameworks to predict EMG patterns evoked by either TMS or voluntary movements. Five healthy right-handed subjects participated in the study. 8 hand muscles were recorded to capture either TMS-evoked motor evoked potential (MEP) and electromyography (EMG) resulted from subjects’ shaping American Sign Language (ASL) letters and numbers. NMF was utilized to extract synergies from both MEP and EMG data. We observed 5 or 6 synergies can capture 90% of variance of original and matched synergies of two classes. The reconstructions of the original datasets (VTMS: MEP data; Vvol: EMG data; Vrand: Random data as control) from synergies (Hvol synergies elicited from ASL tasks; HTMS synergies elicited from TMS) was done by the nonnegative least-square algorithm, and Proportion of Variance Accounted for (PAV) served as a measure to quantify the quality of the estimation, giving results Hvol -> Vvol: 0.92±0.02; HTMS -> VTMS: 0.94±0.02; Hvol -> Vrand: 0.53±0.03; HTMS -> Vrand: 0.53±0.07; HTMS -> Vvol: 0.70±0.06; Hvol -> VTMS: 0.79±0.06. In conclusion, we argue that cortical components may involve in encoding synergies and we also demonstrate the possibility of synergies serving as frameworks in predicting and explaining human hand postures in general. Advisors/Committee Members: Sergei Adamovich, Mesut Sahin, Max Roman.

Subjects/Keywords: Muscle synergy hypothesis; Muscle synergies; Transcranial magnetic stimulation; Biomedical Engineering and Bioengineering

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APA (6^th Edition):

Wei, Y. (2016). Comparison of muscle synergies elicited from transcranial meganetic stimulation (tms) and voluntary movements. (Thesis). New Jersey Institute of Technology. Retrieved from https://digitalcommons.njit.edu/theses/291

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):

Wei, Yifei. “Comparison of muscle synergies elicited from transcranial meganetic stimulation (tms) and voluntary movements.” 2016. Thesis, New Jersey Institute of Technology. Accessed March 06, 2021. https://digitalcommons.njit.edu/theses/291.

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

MLA Handbook (7^th Edition):

Wei, Yifei. “Comparison of muscle synergies elicited from transcranial meganetic stimulation (tms) and voluntary movements.” 2016. Web. 06 Mar 2021.

Vancouver:

Wei Y. Comparison of muscle synergies elicited from transcranial meganetic stimulation (tms) and voluntary movements. [Internet] [Thesis]. New Jersey Institute of Technology; 2016. [cited 2021 Mar 06]. Available from: https://digitalcommons.njit.edu/theses/291.

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

Council of Science Editors:

Wei Y. Comparison of muscle synergies elicited from transcranial meganetic stimulation (tms) and voluntary movements. [Thesis]. New Jersey Institute of Technology; 2016. Available from: https://digitalcommons.njit.edu/theses/291

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

University of New South Wales

2. Hesam-Shariati, Negin. Neurophysiological and kinematic correlates of improved motor-function in complex therapy movements in chronic stroke.

Degree: Medical Sciences, 2018, University of New South Wales

URL: http://handle.unsw.edu.au/1959.4/60213 ; https://unsworks.unsw.edu.au/fapi/datastream/unsworks:51080/SOURCE2?view=true

► The most common outcome post-stroke is motor impairment which is typically assessed using clinical tools mainly based on categorical and subjective scoring. This thesis investigated… (more)

▼ The most common outcome post-stroke is motor impairment which is typically assessed using clinical tools mainly based on categorical and subjective scoring. This thesis investigated longitudinal changes using quantitative measures of muscle activation and movement kinematics to understand therapy-induced improvements of motor-function in chronic stroke. Electromyography (EMG) and tri-axial accelerometry were recorded from 6 sensors on the more-affected upper body of 24 patients during early- and late-therapy of an intensive 14-day program of Wii-based Movement Therapy, and for a subset of 13 patients at 6-month follow-up. Patients were classified according to residual voluntary motor capacity with low, moderate or high motor-function. Clinical motor-function was assessed pre- and post-therapy and at follow-up. Neurophysiological parameters including EMG area under the curve and muscle synergies, and movement kinematics were measured to investigate the improved motor-function. Finally, the correlates and potential predictors of therapy-induced and longitudinal changes were investigated using a multivariate model. Clinical assessments showed improved motor-function and independence in everyday life over time. The pattern of EMG change by late-therapy was variable within and between classifications of motor-function. Muscle synergy analysis revealed fewer synergies for patients with low compared to those with high motor-function at early-therapy, with a pattern of increased synergies by late-therapy. Movement acceleration magnitude increased over time but was significant only at proximal sensors; there was an effect of motor-function on acceleration at distal sensors. The multivariate model demonstrated that depression scores could predict 31% of improved motor-function, while baseline muscle synergy counts predicted 33% of the increase in acceleration magnitude. Different patterns of EMG and kinematic changes were observed according to motor-function level despite heterogeneity within each level that was not evident with clinical assessments. The combination of EMG and kinematic changes suggest improved motor control which was reflected in significantly greater independence in everyday life. This thesis demonstrates that patients in chronic stroke have the capacity to improve, and that there is no one pattern of improvement. The different patterns of improvement can be revealed by quantitative neurophysiological and kinematic measures but not clinical tools. Pooling data may obscure the changes in chronic stroke. Advisors/Committee Members: McNulty, Penelope, Medical Sciences, Faculty of Medicine, UNSW.

Subjects/Keywords: Muscle activation; Chronic stroke; Upper limb; Muscle synergy; Kinematics; Motor function; Rehabilitation

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APA (6^th Edition):

Hesam-Shariati, N. (2018). Neurophysiological and kinematic correlates of improved motor-function in complex therapy movements in chronic stroke. (Doctoral Dissertation). University of New South Wales. Retrieved from http://handle.unsw.edu.au/1959.4/60213 ; https://unsworks.unsw.edu.au/fapi/datastream/unsworks:51080/SOURCE2?view=true

Chicago Manual of Style (16^th Edition):

Hesam-Shariati, Negin. “Neurophysiological and kinematic correlates of improved motor-function in complex therapy movements in chronic stroke.” 2018. Doctoral Dissertation, University of New South Wales. Accessed March 06, 2021. http://handle.unsw.edu.au/1959.4/60213 ; https://unsworks.unsw.edu.au/fapi/datastream/unsworks:51080/SOURCE2?view=true.

MLA Handbook (7^th Edition):

Hesam-Shariati, Negin. “Neurophysiological and kinematic correlates of improved motor-function in complex therapy movements in chronic stroke.” 2018. Web. 06 Mar 2021.

Vancouver:

Hesam-Shariati N. Neurophysiological and kinematic correlates of improved motor-function in complex therapy movements in chronic stroke. [Internet] [Doctoral dissertation]. University of New South Wales; 2018. [cited 2021 Mar 06]. Available from: http://handle.unsw.edu.au/1959.4/60213 ; https://unsworks.unsw.edu.au/fapi/datastream/unsworks:51080/SOURCE2?view=true.

Council of Science Editors:

Hesam-Shariati N. Neurophysiological and kinematic correlates of improved motor-function in complex therapy movements in chronic stroke. [Doctoral Dissertation]. University of New South Wales; 2018. Available from: http://handle.unsw.edu.au/1959.4/60213 ; https://unsworks.unsw.edu.au/fapi/datastream/unsworks:51080/SOURCE2?view=true

Rice University

3. McDonald, Craig G. Myoelectric Sensing for Intent Detection and Assessment in Upper-Limb Robotic Rehabilitation.

Degree: PhD, Engineering, 2020, Rice University

URL: http://hdl.handle.net/1911/108419

► This thesis explores how surface electromyography (EMG) – the measurement of muscle force through voltage changes at the skin surface – can be of use… (more)

▼ This thesis explores how surface electromyography (EMG) – the measurement of muscle force through voltage changes at the skin surface – can be of use to the field of upper-limb robotic rehabilitation. We focus on two main aspects: detecting human intention from measured muscle activity and assessing human motor coordination through synchronous muscle activations known as muscle synergies – each examples of the bidirectional communication found in tightly integrated human-robot interaction. EMG-based intent detection presents an opportunity to examine and promote human engagement at the neuromuscular level, enabling new protocols for intervention that could be combined with robotic rehabilitation, particularly for the most impaired of users. Meanwhile, the latest research in motor control proposes that natural, healthy human movement can be characterized by the presence of certain muscle synergies, and that the alteration of these synergies indicates a disruption, from neurological impairment or some other physical constraints, in natural movement. Wearable robotic devices are capable of altering muscle synergies, and though the mechanisms are not yet understood, a focus on altering muscle synergies is a promising new approach to neurorehabilitation. This thesis employs a robotic exoskeleton for the elbow and wrist joints designed for research in robotic rehabilitation of individuals with neurological impairments and now integrated with a myoelectric control interface. We first demonstrate the ability of a myoelectric interface to discern the user’s intended direction of motion in single-degree-of-freedom (DoF) and multi-DoF control modes with 10 able-bodied participants and 4 participants with incomplete cervical spinal cord injury (SCI). Predictive accuracy was high for able-bodied participants (averages over 99% for single-DoF and near 90% for multi-DoF), and performance in the SCI group was promising (averages ranging from 85% to 95% for single-DoF, and variable multi-DoF performance averaging around 60%), which is encouraging for the future use of myoelectric interfaces in robotic rehabilitation for SCI. Second, we explore the identification of synchronous muscle synergies in the muscles controlling the elbow and wrist, and the possible effects of robot-imposed task constraints on the neural constrains represented by synergy patterns. Our results indicate that constraining the unused degrees of freedom during a single-DoF movement inside the exoskeleton does not have a significant effect on the underlying muscle synergies in the task, and that methodological choices in muscle synergy analysis also do not have a large effect on the outcome. With all of these findings, we have achieved a deeper understanding of the value myoelectric sensing can bring to upper-limb robotic rehabilitation, and how much potential it has to advance the field toward greater accessibility to individuals of all levels of impairment. Advisors/Committee Members: O'Malley, Marcia K (advisor).

Subjects/Keywords: electromyography; robotics; rehabilitation robotics; muscle synergy analysis; intent detection

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

APA (6^th Edition):

McDonald, C. G. (2020). Myoelectric Sensing for Intent Detection and Assessment in Upper-Limb Robotic Rehabilitation. (Doctoral Dissertation). Rice University. Retrieved from http://hdl.handle.net/1911/108419

Chicago Manual of Style (16^th Edition):

McDonald, Craig G. “Myoelectric Sensing for Intent Detection and Assessment in Upper-Limb Robotic Rehabilitation.” 2020. Doctoral Dissertation, Rice University. Accessed March 06, 2021. http://hdl.handle.net/1911/108419.

MLA Handbook (7^th Edition):

McDonald, Craig G. “Myoelectric Sensing for Intent Detection and Assessment in Upper-Limb Robotic Rehabilitation.” 2020. Web. 06 Mar 2021.

Vancouver:

McDonald CG. Myoelectric Sensing for Intent Detection and Assessment in Upper-Limb Robotic Rehabilitation. [Internet] [Doctoral dissertation]. Rice University; 2020. [cited 2021 Mar 06]. Available from: http://hdl.handle.net/1911/108419.

Council of Science Editors:

McDonald CG. Myoelectric Sensing for Intent Detection and Assessment in Upper-Limb Robotic Rehabilitation. [Doctoral Dissertation]. Rice University; 2020. Available from: http://hdl.handle.net/1911/108419

Georgia Tech

4. Chvatal, Stacie Ann. Muscle synergies for directional control of center of mass in various postural strategies.

Degree: PhD, Biomedical Engineering, 2011, Georgia Tech

URL: http://hdl.handle.net/1853/43648

► Our long-term goal is to better understand how the nervous system controls muscles to generate movement. Our overall hypothesis is that the nervous system coordinates… (more)

▼ Our long-term goal is to better understand how the nervous system controls muscles to generate movement. Our overall hypothesis is that the nervous system coordinates muscles by flexibly recruiting muscle synergies, defined here as groups of muscles simultaneously activated in fixed ratios, in order to map high-level task goals into motor actions. Here we studied muscle coordination in the context of balance control - a task that requires multisensory integration and coordination of multiple muscles, yet has a clear goal of controlling the center of mass (CoM), which can be achieved by using different strategies. If muscle synergies are a common mechanism used by the nervous system for balance control, we would expect to see the same muscle synergies used in a variety of strategies. Therefore we investigated the robustness of the muscle synergies in a variety of human postural strategies, such as standing, stepping and walking, to determine whether muscle synergies are a consistent underlying mechanism used by the nervous system. We hypothesized that muscle synergies are recruited to control a task-level variable (e.g. CoM direction) that is not specific to a particular postural strategy. We demonstrated that similar muscle synergies are used in reactive responses to standing balance perturbations, in reactive stepping responses, in walking, and in reactive postural responses during walking, suggesting a common neural mechanism not only for balance control in various contexts, but for movement in general. The differences in the timing and spatial organization of muscle activity in standing, stepping, and walking postural responses were largely explained by altering the recruitment of a common set of muscle synergies, with the addition of only a single muscle synergy specific to each behavior. We demonstrated the functionality of muscle synergies by showing that each muscle synergy was correlated with a particular force produced at the ground and component of CoM acceleration both in stepping and in non-stepping postural responses. These results suggest that muscle synergies reflect the neural organization of the motor system, representing motor modules recruited to achieve a common biomechanical function across different postural behaviors. Additionally, muscle synergies used during walking were recruited during atypical phases of the gait cycle in response to an unexpected perturbation, in order to maintain balance and continue walking, suggesting a common neural mechanism for different balance requirements during walking. The compositions of muscle synergies used during walking were similar to those used during walking perturbations as well as standing balance perturbations, suggesting that muscle synergies represent common neural mechanisms for CoM movement control under different dynamic conditions. These results are of interest to a variety of fields such as rehabilitation science, prosthetics, and robotics. Advisors/Committee Members: Ting, Lena (Committee Chair), Chang, Young-Hui (Committee Member), Lee, Robert (Committee Member), Nichols, T. Richard (Committee Member), Wolf, Steven (Committee Member).

Subjects/Keywords: EMG; Locomotion; Balance; Muscle synergy; Nervous system; Equilibrium (Physiology); Human locomotion

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

APA (6^th Edition):

Chvatal, S. A. (2011). Muscle synergies for directional control of center of mass in various postural strategies. (Doctoral Dissertation). Georgia Tech. Retrieved from http://hdl.handle.net/1853/43648

Chicago Manual of Style (16^th Edition):

Chvatal, Stacie Ann. “Muscle synergies for directional control of center of mass in various postural strategies.” 2011. Doctoral Dissertation, Georgia Tech. Accessed March 06, 2021. http://hdl.handle.net/1853/43648.

MLA Handbook (7^th Edition):

Chvatal, Stacie Ann. “Muscle synergies for directional control of center of mass in various postural strategies.” 2011. Web. 06 Mar 2021.

Vancouver:

Chvatal SA. Muscle synergies for directional control of center of mass in various postural strategies. [Internet] [Doctoral dissertation]. Georgia Tech; 2011. [cited 2021 Mar 06]. Available from: http://hdl.handle.net/1853/43648.

Council of Science Editors:

Chvatal SA. Muscle synergies for directional control of center of mass in various postural strategies. [Doctoral Dissertation]. Georgia Tech; 2011. Available from: http://hdl.handle.net/1853/43648

University of Texas – Austin

5. Moghe, Rahul Milind. Muscle activation patterns for voluntary isometric stiffness in human index finger.

Degree: MSin Engineering, Mechanical Engineering, 2019, University of Texas – Austin

URL: http://dx.doi.org/10.26153/tsw/2816

► Humans can voluntarily control their finger stiffness for grasping and manipulation tasks. A long standing question in biomechanics is aimed at understanding the criterion used… (more)

▼ Humans can voluntarily control their finger stiffness for grasping and manipulation tasks. A long standing question in biomechanics is aimed at understanding the criterion used by the cenrtal nervous system to control the motor output of human limbs. Humans are known to voluntarily control their limb posture, end-tip force and stiffness. This thesis concerns itself with controlling stiffness in isometric conditions only. This work examines the variability of voluntary isometric stiffness modulation for the index finger at constant fingertip force. Previous studies either investigated muscle synergies responsible for different force-stiffness conditions or only measured behavioral measures of stiffness. However, the variability of stiffness for constant force condition was not explained. In this study, the stiffness of the index finger was modulated while maintaining a constant isometric fingertip force at 4 different force magnitudes and 2 different force directions. The muscle activations of 7 muscles that are related to the index finger were measured using surface electromyography (sEMG) sensors. Synergies estimated from a principal component analysis (PCA) using the recorded sEMG showed that the contribution of one synergy explains 80-95% of the variation in the data. The degree of alignment was used to analyze these stiffness synergies for different force conditions. The minimum mean value of degree of alignment was found for the comparison between synergies at high forces. However, comparison of synergies at lower forces showed that the stiffness synergy varies more with the forcing direction than it does with force magnitude. These results show the existence of a stiffness synergy to modulate the stiffness for individual force direction regardless of the magnitude of force level. Although the results at higher forces do not agree with this conclusion, stiffness modulation is prominent only at lower forces. This result gives an insight into what muscle synergies are important for modulating the fingertip stiffness. It can prove useful in robotics applications to simplify stiffness modulation without explicitly calculating inverse kinematics and also in restoring stiffness modulation after hand injury Advisors/Committee Members: Deshpande, Ashish D. (advisor).

Subjects/Keywords: Stiffness modulation; Index finger; Muscle synergy; Iso-torque space; Voluntary stiffness

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APA (6^th Edition):

Moghe, R. M. (2019). Muscle activation patterns for voluntary isometric stiffness in human index finger. (Masters Thesis). University of Texas – Austin. Retrieved from http://dx.doi.org/10.26153/tsw/2816

Chicago Manual of Style (16^th Edition):

Moghe, Rahul Milind. “Muscle activation patterns for voluntary isometric stiffness in human index finger.” 2019. Masters Thesis, University of Texas – Austin. Accessed March 06, 2021. http://dx.doi.org/10.26153/tsw/2816.

MLA Handbook (7^th Edition):

Moghe, Rahul Milind. “Muscle activation patterns for voluntary isometric stiffness in human index finger.” 2019. Web. 06 Mar 2021.

Vancouver:

Moghe RM. Muscle activation patterns for voluntary isometric stiffness in human index finger. [Internet] [Masters thesis]. University of Texas – Austin; 2019. [cited 2021 Mar 06]. Available from: http://dx.doi.org/10.26153/tsw/2816.

Council of Science Editors:

Moghe RM. Muscle activation patterns for voluntary isometric stiffness in human index finger. [Masters Thesis]. University of Texas – Austin; 2019. Available from: http://dx.doi.org/10.26153/tsw/2816

6. Kim, Hoon. Experimental & Simulation Approaches to Study Neuromuscular Control in People with Chronic Ankle Instability.

Degree: 2020, Marquette University

URL: https://epublications.marquette.edu/dissertations_mu/1030

► Ankle sprains are among the most common musculoskeletal injuries, and up to 70% of people who sprain their ankles develop chronic ankle instability (CAI). Moreover,… (more)

▼ Ankle sprains are among the most common musculoskeletal injuries, and up to 70% of people who sprain their ankles develop chronic ankle instability (CAI). Moreover, people who develop CAI have a significantly higher risk of developing ankle osteoarthritis. Recent research has identified neuromuscular deficits that may be responsible for the high recurrence rates of ankle sprains and for the progression towards ankle osteoarthritis in people with CAI. Unfortunately, current rehabilitation strategies are not completely successful because the mechanisms responsible for these deficits are not fully elucidated. Therefore, the purpose of this dissertation was to investigate individual muscle forces and force generating capacities, the contributions of individual muscles to ankle joint contact forces, muscle activation patterns in the time-frequency domain, and central nervous system control strategies in people with CAI.Eleven people with CAI and 11 matched healthy control performed landing, anticipated cutting, and unanticipated cutting tasks, while three-dimensional movement, ground reaction force, and muscle activation data were collected with motion capture system, force plate, and electromyography, respectively. In the first study, a musculoskeletal model and static optimization were used to estimate the force and force generating capacity of individual muscles. In the second study, an additional joint reaction analysis was used in combination with the musculoskeletal model to estimate the contribution of individual muscle forces to ankle joint contact forces. In the third study, wavelet transformation and principal component analysis were used to analyze the time-frequency domain of muscle activation patterns. In the final study, non-negative matrix factorization was used to extract muscle synergies in order to identify central nervous system control strategies. Results from all analyses were compared between people with and without CAI.The primary findings of this dissertation were that, compared to healthy controls, people with CAI exhibit 1) greater muscle forces and/or force generating capacities in proximal muscles, 2) greater ankle anterior shear forces during early and late stance phases of unanticipated cutting, 3) lower intensity of muscle activation and a task-dependent inability to shift activation towards higher frequencies, and 4) similar complexity in neuromuscular control from a central nervous system perspective. Advisors/Committee Members: Kipp, Kristof, Kruger, Karen, Starsky, Andrew.

Subjects/Keywords: Ankle; Instability; Modeling; Muscle; Simulation; Synergy; Physical Therapy

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APA (6^th Edition):

Kim, H. (2020). Experimental & Simulation Approaches to Study Neuromuscular Control in People with Chronic Ankle Instability. (Thesis). Marquette University. Retrieved from https://epublications.marquette.edu/dissertations_mu/1030

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):

Kim, Hoon. “Experimental & Simulation Approaches to Study Neuromuscular Control in People with Chronic Ankle Instability.” 2020. Thesis, Marquette University. Accessed March 06, 2021. https://epublications.marquette.edu/dissertations_mu/1030.

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

MLA Handbook (7^th Edition):

Kim, Hoon. “Experimental & Simulation Approaches to Study Neuromuscular Control in People with Chronic Ankle Instability.” 2020. Web. 06 Mar 2021.

Vancouver:

Kim H. Experimental & Simulation Approaches to Study Neuromuscular Control in People with Chronic Ankle Instability. [Internet] [Thesis]. Marquette University; 2020. [cited 2021 Mar 06]. Available from: https://epublications.marquette.edu/dissertations_mu/1030.

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

Council of Science Editors:

Kim H. Experimental & Simulation Approaches to Study Neuromuscular Control in People with Chronic Ankle Instability. [Thesis]. Marquette University; 2020. Available from: https://epublications.marquette.edu/dissertations_mu/1030

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

University of Colorado

7. Feeney, Daniel Francis. The Coordination of Movement from Motor Units to Muscle Synergies.

Degree: PhD, 2018, University of Colorado

URL: https://scholar.colorado.edu/iphy_gradetds/80

► This dissertation comprises computational and experimental studies that examined the neuromuscular factors underlying differences in manual dexterity and mobility in health and disease. The… (more)

▼ This dissertation comprises computational and experimental studies that examined the neuromuscular factors underlying differences in manual dexterity and mobility in health and disease. The first two studies developed models of motor unit force production. The first model used a Proportional-Integral-Derivative (PID) control algorithm to activate a pool of motor units to simulate the force trajectory during force-matching tasks. The second model comprised a probabilistic state-space model to estimate the common synaptic input to motor neurons based on the discharge times of action potentials by activated motor units. The state-space model demonstrated superior sensitivity compared with previous models. The next three studies examined manual dexterity and begin with the use of the state-space model to quantify variability in common synaptic input for young and older adults during isometric contractions, and how this variability related to performance on a pegboard test of manual dexterity. Variability in common synaptic input was significantly associated with the coefficient of variation for force during steady contractions (force steadiness) and with pegboard times in older adults. The source of the force fluctuations was evaluated by comparing force steadiness during voluntary and electrically evoked contractions. Force steadiness was worse for old adults than young adults during voluntary contractions, but there was no difference between age groups during the electrically evoked contractions. Thus, differences in force steadiness must arise from signal transduction in the central nervous system and not the periphery. The plasticity of pegboard performance was examined by comparing peg-manipulation characteristics of persons with multiple sclerosis to healthy controls. Grooved pegboard time for individuals with MS was most associated with the time to select a peg, whereas times for healthy controls were most related to peg transportation and selection. The last two studies examine the influence of an orthopedic problem (sacroiliac joint dysfunction) on movement patterns. These individuals exhibited a compromised muscle synergy when walking and greater movement asymmetries during a sit-to-stand task. This dissertation explored how common synaptic input influences force steadiness and manual dexterity, how multiple sclerosis alters manual dexterity, and how individuals with sacroiliac joint dysfunction differ from healthy controls during walking and sit-to-stand tasks. Advisors/Committee Members: Roger M. Enoka, Francois Meyer, Alaa Ahmed, Rodger Kram, Alena Grabowski.

Subjects/Keywords: computational model; motor unit; pid controller; synergies; muscle synergy; Biomedical Engineering and Bioengineering; Neurosciences; Physiology

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APA (6^th Edition):

Feeney, D. F. (2018). The Coordination of Movement from Motor Units to Muscle Synergies. (Doctoral Dissertation). University of Colorado. Retrieved from https://scholar.colorado.edu/iphy_gradetds/80

Chicago Manual of Style (16^th Edition):

Feeney, Daniel Francis. “The Coordination of Movement from Motor Units to Muscle Synergies.” 2018. Doctoral Dissertation, University of Colorado. Accessed March 06, 2021. https://scholar.colorado.edu/iphy_gradetds/80.

MLA Handbook (7^th Edition):

Feeney, Daniel Francis. “The Coordination of Movement from Motor Units to Muscle Synergies.” 2018. Web. 06 Mar 2021.

Vancouver:

Feeney DF. The Coordination of Movement from Motor Units to Muscle Synergies. [Internet] [Doctoral dissertation]. University of Colorado; 2018. [cited 2021 Mar 06]. Available from: https://scholar.colorado.edu/iphy_gradetds/80.

Council of Science Editors:

Feeney DF. The Coordination of Movement from Motor Units to Muscle Synergies. [Doctoral Dissertation]. University of Colorado; 2018. Available from: https://scholar.colorado.edu/iphy_gradetds/80

Delft University of Technology

8. De Bruijn, E. Isometric and Dynamic Control of Neck Muscles: Reflexive contributions and muscle synergies.

Degree: 2014, Delft University of Technology

URL: http://resolver.tudelft.nl/uuid:5f96057b-46bb-4e82-80ad-90519aee6916 ; urn:NBN:nl:ui:24-uuid:5f96057b-46bb-4e82-80ad-90519aee6916 ; urn:NBN:nl:ui:24-uuid:5f96057b-46bb-4e82-80ad-90519aee6916 ; http://resolver.tudelft.nl/uuid:5f96057b-46bb-4e82-80ad-90519aee6916

► It is well established that the central nervous system (CNS) stabilizes the head using reflexive feedback and cocontraction. The major reflexive pathways in the neck… (more)

▼ It is well established that the central nervous system (CNS) stabilizes the head using reflexive feedback and cocontraction. The major reflexive pathways in the neck are through muscle spindles generating the cervicocollic reflex (CCR) and through the vestibular organ generating the vestibulocollic reflex (VCR). The CNS modulates the contribution of the different pathways and the level of cocontraction to change the system dynamics in an effort to optimally withstand motion disturbances. Predetermined groups of muscles, called synergies, are used to generate stabilizing forces, but it is not clear how the CNS modulates the reflexive pathways and how the muscle groups are chosen. To understand the function of the different reflexive pathways and the responses of the different muscles musculoskeletal models are necessary. To date, a neck model with sufficient detail to simulate vertebral injury and reflexive control of individual muscles does not exist. There are a number of reasons why the behavior of the CNS in neck muscle control should be investigated. Cervical dystonia is a movement disorder characterized by involuntary activity of the neck muscles leading to debilitating abnormal postures and twisting movements. Current evidence points towards changes in the neuronal circuitry in the brain, but the underlying pathology remains for the most part unclear. The understanding of normal and aberrant control of muscles is an important key to finding a solution for this disorder. The current treatment involves injecting the dystonic muscles with botulinum toxin. Although this treatment is generally quite successful, it often remains difficult to distinguish dystonic muscles from healthy compensatory activation. Improvements in the protocols to select aberrant muscles in patients would improve the effectiveness of the treatment and could be an asset when treating more difficult cases. Two aims were set out in this thesis. The first was to establish how the CCR and VCR pathways activate individual muscles to ensure head and neck stabilization and how their gains modulate under different loading conditions. To this end a detailed neuromuscular model was developed containing reflexive neuromuscular feedback and cocontraction. The second aim was to understand the pathology behind cervical dystonia by quantifying aberrance of individual muscle activation in patients, and to develop a protocol to improved muscle selection for possible diagnostic use. In total, five studies were performed to achieve these goals. The first aim of this thesis was achieved by investigating neuromuscular control of healthy subjects using a dynamic experiment and a detailed neuromuscular model. First, we wanted to establish a relationship between the modulation of reflexes and the amplitude and bandwidth of a disturbance to the head and neck (Chapter 2). This was determined by perturbing seated subjects in an anteriorposterior direction with varying amplitudes and frequency content. We found a substantial attenuation of both vestibulocollic and… Advisors/Committee Members: Van der Helm, F.C.T., De Koning-Tijssen, M.A.J., Happee, R..

Subjects/Keywords: cervical dystonia; isometric; muscle synergy; neuromuscular model; voluntary contraction

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APA (6^th Edition):

De Bruijn, E. (2014). Isometric and Dynamic Control of Neck Muscles: Reflexive contributions and muscle synergies. (Doctoral Dissertation). Delft University of Technology. Retrieved from http://resolver.tudelft.nl/uuid:5f96057b-46bb-4e82-80ad-90519aee6916 ; urn:NBN:nl:ui:24-uuid:5f96057b-46bb-4e82-80ad-90519aee6916 ; urn:NBN:nl:ui:24-uuid:5f96057b-46bb-4e82-80ad-90519aee6916 ; http://resolver.tudelft.nl/uuid:5f96057b-46bb-4e82-80ad-90519aee6916

Chicago Manual of Style (16^th Edition):

De Bruijn, E. “Isometric and Dynamic Control of Neck Muscles: Reflexive contributions and muscle synergies.” 2014. Doctoral Dissertation, Delft University of Technology. Accessed March 06, 2021. http://resolver.tudelft.nl/uuid:5f96057b-46bb-4e82-80ad-90519aee6916 ; urn:NBN:nl:ui:24-uuid:5f96057b-46bb-4e82-80ad-90519aee6916 ; urn:NBN:nl:ui:24-uuid:5f96057b-46bb-4e82-80ad-90519aee6916 ; http://resolver.tudelft.nl/uuid:5f96057b-46bb-4e82-80ad-90519aee6916.

MLA Handbook (7^th Edition):

De Bruijn, E. “Isometric and Dynamic Control of Neck Muscles: Reflexive contributions and muscle synergies.” 2014. Web. 06 Mar 2021.

Vancouver:

De Bruijn E. Isometric and Dynamic Control of Neck Muscles: Reflexive contributions and muscle synergies. [Internet] [Doctoral dissertation]. Delft University of Technology; 2014. [cited 2021 Mar 06]. Available from: http://resolver.tudelft.nl/uuid:5f96057b-46bb-4e82-80ad-90519aee6916 ; urn:NBN:nl:ui:24-uuid:5f96057b-46bb-4e82-80ad-90519aee6916 ; urn:NBN:nl:ui:24-uuid:5f96057b-46bb-4e82-80ad-90519aee6916 ; http://resolver.tudelft.nl/uuid:5f96057b-46bb-4e82-80ad-90519aee6916.

Council of Science Editors:

De Bruijn E. Isometric and Dynamic Control of Neck Muscles: Reflexive contributions and muscle synergies. [Doctoral Dissertation]. Delft University of Technology; 2014. Available from: http://resolver.tudelft.nl/uuid:5f96057b-46bb-4e82-80ad-90519aee6916 ; urn:NBN:nl:ui:24-uuid:5f96057b-46bb-4e82-80ad-90519aee6916 ; urn:NBN:nl:ui:24-uuid:5f96057b-46bb-4e82-80ad-90519aee6916 ; http://resolver.tudelft.nl/uuid:5f96057b-46bb-4e82-80ad-90519aee6916

9. Hashiguchi, Yu. Merging and Fractionation of Muscle Synergy Indicate the Recovery Process in Patients with Hemiplegia: The First Study of Patients after Subacute Stroke.

Degree: 2018, Kyoto University

URL: http://hdl.handle.net/2433/232317

Subjects/Keywords: Muscle Synergy; Non-Negative Matrix Factorization; Merging and Fractionation of Synergy; Gait; Patients after Subaute Stroke

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APA (6^th Edition):

Hashiguchi, Y. (2018). Merging and Fractionation of Muscle Synergy Indicate the Recovery Process in Patients with Hemiplegia: The First Study of Patients after Subacute Stroke. (Thesis). Kyoto University. Retrieved from http://hdl.handle.net/2433/232317

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):

Hashiguchi, Yu. “Merging and Fractionation of Muscle Synergy Indicate the Recovery Process in Patients with Hemiplegia: The First Study of Patients after Subacute Stroke. ” 2018. Thesis, Kyoto University. Accessed March 06, 2021. http://hdl.handle.net/2433/232317.

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

MLA Handbook (7^th Edition):

Hashiguchi, Yu. “Merging and Fractionation of Muscle Synergy Indicate the Recovery Process in Patients with Hemiplegia: The First Study of Patients after Subacute Stroke. ” 2018. Web. 06 Mar 2021.

Vancouver:

Hashiguchi Y. Merging and Fractionation of Muscle Synergy Indicate the Recovery Process in Patients with Hemiplegia: The First Study of Patients after Subacute Stroke. [Internet] [Thesis]. Kyoto University; 2018. [cited 2021 Mar 06]. Available from: http://hdl.handle.net/2433/232317.

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

Council of Science Editors:

Hashiguchi Y. Merging and Fractionation of Muscle Synergy Indicate the Recovery Process in Patients with Hemiplegia: The First Study of Patients after Subacute Stroke. [Thesis]. Kyoto University; 2018. Available from: http://hdl.handle.net/2433/232317

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

10. Colangelo, Teresa. Lower Limb Muscle Synergy During Daily Life Activities : A Way to Convey Intended Motions To a Robotic Assistive Device.

Degree: Biotechnology and Health (CBH), 2018, KTH

URL: http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-231906

► Powered exoskeletons can assist patients suffering from motor dysfunctions. Recent researches are focused on how to improve the communication system between patient and device.… (more)

Subjects/Keywords: muscle synergy; lower limb; knee; exoskeleton; EMG; Medical Engineering; Medicinteknik

…33 33 33 33 35 37 37 38 39 40 CONTENTS CONTENTS A.4 Muscle synergy… …shown in table 3.1. Table 3.1: Three muscle synergies and corresponding muscles. Synergy… …Total values express the average of standard deviation for each muscle synergy. Values > 15… …deviation for each muscle synergy. Values > 15% are indicated with *. (a) Subject M1… …muscle synergy. Values > 15% are indicated with *. (a) Subject M1 SD [%]…

10 more images…

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

APA (6^th Edition):

Colangelo, T. (2018). Lower Limb Muscle Synergy During Daily Life Activities : A Way to Convey Intended Motions To a Robotic Assistive Device. (Thesis). KTH. Retrieved from http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-231906

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):

Colangelo, Teresa. “Lower Limb Muscle Synergy During Daily Life Activities : A Way to Convey Intended Motions To a Robotic Assistive Device.” 2018. Thesis, KTH. Accessed March 06, 2021. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-231906.

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

MLA Handbook (7^th Edition):

Colangelo, Teresa. “Lower Limb Muscle Synergy During Daily Life Activities : A Way to Convey Intended Motions To a Robotic Assistive Device.” 2018. Web. 06 Mar 2021.

Vancouver:

Colangelo T. Lower Limb Muscle Synergy During Daily Life Activities : A Way to Convey Intended Motions To a Robotic Assistive Device. [Internet] [Thesis]. KTH; 2018. [cited 2021 Mar 06]. Available from: http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-231906.

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

Council of Science Editors:

Colangelo T. Lower Limb Muscle Synergy During Daily Life Activities : A Way to Convey Intended Motions To a Robotic Assistive Device. [Thesis]. KTH; 2018. Available from: http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-231906

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

11. Supiot, Anthony. Evaluation de l’organisation locomotrice du patient hémiparétique et paraparétique par extraction des synergies musculaires : Evaluation of the locomotor organization of the hemiparetic and paraparetic patient by extraction of muscle synergies.

Degree: Docteur es, Sciences du sport et du mouvement humain, 2019, Université Paris-Saclay (ComUE)

URL: http://www.theses.fr/2019SACLV006

►

À la suite d’une lésion du système nerveux central tel qu’un accident vasculaire cérébral ou une lésion médullaire incomplète un ensemble de symptômes tel que… (more)

▼

À la suite d’une lésion du système nerveux central tel qu’un accident vasculaire cérébral ou une lésion médullaire incomplète un ensemble de symptômes tel que la parésie, l’hyperactivité musculaire et l’hypo-extensibilité des tissus vont perturber l’organisation locomotrice du patient. Depuis quelques années, l’utilisation de méthodes mathématiques permet d’extraire à partir de l’activité électrique des muscles la commande à l’organisation locomotrice du sujet. L’objectif de ce travail de thèse est d’utiliser ces méthodes pour caractériser les spécificités du patient hémiparétique et paraparétique. Une première étude sur le sujet asymptomatique a permis de valider notre méthodologie..La deuxième étude portant sur les patients paraparétiques montre que l’asymétrie de marche est plutôt expliquée par une expression différente des symptômes plutôt qu’une réelle asymétrie provenant de la commande. Pour conclure, la troisième étude portant sur l’effet d’une anesthésie d’un muscle chez le patient hémiparétique a montré que le cerveau était en mesure de modifier la commande locomotrice pour pallier les perturbations induites par cette anesthésie. En conclusion nos travaux soulignent l’intérêt de ces méthodes comme un outil pertinent dans l’évaluation de l’organisation locomotrice chez le patient présentant une lésion du système nerveux central.

Following a central nervous system injury such as a stroke or incomplete spinal cord injury, a set of symptoms such as paresis, muscle hyperactivity and hypo-extensibility will disrupt the patient’s locomotor organization. In recent years, the use of mathematical methods has made it possible to extract, from the electrical muscle activities, the command of the locomotor organization. This thesis aimed at using these methods to characterize the specificities of the post-stroke patient and the patient with incomplete spinal cord injury. The first study of healthy individuals allowed to validate our methodology.The second study in patients with incomplete spinal cord injury showed that gait asymmetry may be explained by a different expression of symptoms rather than a real asymmetry originating from the control. Finally, the third study has investigated the effect of muscle anesthesia on the post-stroke patient. The results showed that the central nervous system was able to adapt locomotor control to compensate for the disturbances induced by this anesthesia. In conclusion, our work underlines the interest of these methods as a relevant tool in the evaluation of locomotor organization in patients with central nervous system lesions.

Advisors/Committee Members: Pradon, Didier (thesis director), Berret, Bastien (thesis director).

Subjects/Keywords: Synergies musculaires; Activités locomotrices; Lésion du système nerveux central; Contrôle moteur; Locomotion; Syndrome pyramidal; Muscle synergy; Spasticity; Central nervous system injury; Motor control; Locomotion; Upper motor neurone syndrome; 616.7

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

APA (6^th Edition):

Supiot, A. (2019). Evaluation de l’organisation locomotrice du patient hémiparétique et paraparétique par extraction des synergies musculaires : Evaluation of the locomotor organization of the hemiparetic and paraparetic patient by extraction of muscle synergies. (Doctoral Dissertation). Université Paris-Saclay (ComUE). Retrieved from http://www.theses.fr/2019SACLV006

Chicago Manual of Style (16^th Edition):

Supiot, Anthony. “Evaluation de l’organisation locomotrice du patient hémiparétique et paraparétique par extraction des synergies musculaires : Evaluation of the locomotor organization of the hemiparetic and paraparetic patient by extraction of muscle synergies.” 2019. Doctoral Dissertation, Université Paris-Saclay (ComUE). Accessed March 06, 2021. http://www.theses.fr/2019SACLV006.

MLA Handbook (7^th Edition):

Supiot, Anthony. “Evaluation de l’organisation locomotrice du patient hémiparétique et paraparétique par extraction des synergies musculaires : Evaluation of the locomotor organization of the hemiparetic and paraparetic patient by extraction of muscle synergies.” 2019. Web. 06 Mar 2021.

Vancouver:

Supiot A. Evaluation de l’organisation locomotrice du patient hémiparétique et paraparétique par extraction des synergies musculaires : Evaluation of the locomotor organization of the hemiparetic and paraparetic patient by extraction of muscle synergies. [Internet] [Doctoral dissertation]. Université Paris-Saclay (ComUE); 2019. [cited 2021 Mar 06]. Available from: http://www.theses.fr/2019SACLV006.

Council of Science Editors:

Supiot A. Evaluation de l’organisation locomotrice du patient hémiparétique et paraparétique par extraction des synergies musculaires : Evaluation of the locomotor organization of the hemiparetic and paraparetic patient by extraction of muscle synergies. [Doctoral Dissertation]. Université Paris-Saclay (ComUE); 2019. Available from: http://www.theses.fr/2019SACLV006

Loma Linda University

12. Asavasopon, Skulpan. Cortical Mechanisms of Human Pelvic Floor Muscle Synergies.

Degree: PhD, Rehabilitation Sciences, 2014, Loma Linda University

URL: https://scholarsrepository.llu.edu/etd/163

► The human pelvic floor is an anatomically, functionally, and morphologically complex region that is associated with many disorders such as chronic prostatitis/pelvic pain syndrome… (more)

Subjects/Keywords: Rehabilitation and Therapy; Pelvic Floor; Pelvic Floor Muscles; Pelvic Pain Syndrome; Muscle Synergies; Blood Oxygen Density Levels; Functional Magnetic Resonance Imaging; Cortically Facilitated Synergy

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

APA (6^th Edition):

Asavasopon, S. (2014). Cortical Mechanisms of Human Pelvic Floor Muscle Synergies. (Doctoral Dissertation). Loma Linda University. Retrieved from https://scholarsrepository.llu.edu/etd/163

Chicago Manual of Style (16^th Edition):

Asavasopon, Skulpan. “Cortical Mechanisms of Human Pelvic Floor Muscle Synergies.” 2014. Doctoral Dissertation, Loma Linda University. Accessed March 06, 2021. https://scholarsrepository.llu.edu/etd/163.

MLA Handbook (7^th Edition):

Asavasopon, Skulpan. “Cortical Mechanisms of Human Pelvic Floor Muscle Synergies.” 2014. Web. 06 Mar 2021.

Vancouver:

Asavasopon S. Cortical Mechanisms of Human Pelvic Floor Muscle Synergies. [Internet] [Doctoral dissertation]. Loma Linda University; 2014. [cited 2021 Mar 06]. Available from: https://scholarsrepository.llu.edu/etd/163.

Council of Science Editors:

Asavasopon S. Cortical Mechanisms of Human Pelvic Floor Muscle Synergies. [Doctoral Dissertation]. Loma Linda University; 2014. Available from: https://scholarsrepository.llu.edu/etd/163

University of Georgia

13. Lallathin, Jayma Rene. The effects of foot position on balance displayed by classically trained ballerinas in passe.

Degree: 2014, University of Georgia

URL: http://hdl.handle.net/10724/30511

► The purpose of the study was to compare the effects of the demi and en pointe foot positions on stability outcomes and balance strategies displayed… (more)

▼ The purpose of the study was to compare the effects of the demi and en pointe foot positions on stability outcomes and balance strategies displayed by ballet dancers during performance of the passé position. Ground reaction force (GRF) and electromyographic (EMG) signals (1200 Hz) of 11 muscles of the supporting limb were obtained, and 3-D spatial positions of reflective markers on the dancer’s body were captured using high-speed digital cameras (120Hz), during the dancer’s performance of 10 passé balance trials in each foot position. Outlines of the dancer’s foot were traced to calculate the size of the base of support (BoS) in each foot position. Stability outcomes of time to stabilization (TTS) and sway area (SA) were derived from GRF and center of pressure data. Balance strategies for each foot position were detected using EMG data to determine muscle synergies using non-negative matrix factorization (NMF); overall muscle contribution (OMC) for each muscle was obtained from the synergies, then the muscles were rank ordered by their OMC; and lower extremity joint moment magnitudes were examined. From paired-samples t-test outcomes (p < .05), dancers en pointe compared to demi pointe had decreased TTS (Cohen’s d = .07), BoS (d = 5.22), SA (d = .89), and mean ankle plantarflexor moments (d = 1.53). To maintain balance en demi pointe, the majority of dancers (~65%) exhibited an ankle strategy as classified by the rank order of the OMC. However, the muscle synergies reflected that hip musculature also contributed to balance. When maintaining balance en pointe, the majority of dancers (~71%) used a ‘whole-limb’ balance strategy, as the muscle synergies and OMC reflected that muscles affecting control of all lower extremity joints contributed to balance. Co-contraction of opposing muscle groups at all joints also was displayed, suggesting a muscle activation strategy of maintaining high joint stiffness to maintain balance during ballet when the body must appear to be motionless.

Subjects/Keywords: Balance; Biomechanics; Motor control; Neuromuscular control; Dance; Ballet; Electromyography; Center of Force; Center of Pressure; Center of Mass; Non-Negative Matrix Factorization; Base of Support; Sway Area; Time to Stabilization; Muscle Synergy

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APA (6^th Edition):

Lallathin, J. R. (2014). The effects of foot position on balance displayed by classically trained ballerinas in passe. (Thesis). University of Georgia. Retrieved from http://hdl.handle.net/10724/30511

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):

Lallathin, Jayma Rene. “The effects of foot position on balance displayed by classically trained ballerinas in passe.” 2014. Thesis, University of Georgia. Accessed March 06, 2021. http://hdl.handle.net/10724/30511.

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

MLA Handbook (7^th Edition):

Lallathin, Jayma Rene. “The effects of foot position on balance displayed by classically trained ballerinas in passe.” 2014. Web. 06 Mar 2021.

Vancouver:

Lallathin JR. The effects of foot position on balance displayed by classically trained ballerinas in passe. [Internet] [Thesis]. University of Georgia; 2014. [cited 2021 Mar 06]. Available from: http://hdl.handle.net/10724/30511.

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

Council of Science Editors:

Lallathin JR. The effects of foot position on balance displayed by classically trained ballerinas in passe. [Thesis]. University of Georgia; 2014. Available from: http://hdl.handle.net/10724/30511

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

University of Kentucky

14. Smith, Brennan L. MUSCLE SYNERGY DURING A SINGLE LEG STANDING TEST IN AMBULATORY CHILDREN WITH CEREBRAL PALSY.

Degree: 2018, University of Kentucky

URL: https://uknowledge.uky.edu/khp_etds/51

► INTRODUCTION: Cerebral Palsy (CP) is a sensorimotor disorder characterized by dysfunctional motor coordination, balance problems, and loss of selective motor control. Motor coordination exhibited as… (more)

▼ INTRODUCTION: Cerebral Palsy (CP) is a sensorimotor disorder characterized by dysfunctional motor coordination, balance problems, and loss of selective motor control. Motor coordination exhibited as co-contraction, has been subjectively quantified using gait analysis, but recent studies have begun to objectively analyze the amount of co-contraction by collecting electromyography (EMG) data. Center of pressure excursion (COPE) measurements collected during a single leg standing test (SLST) have shown to be more valid measurements of balance in populations with motor disabilities than a SLST alone. A recent study has correlated increased COPE velocity with a lower fall risk as determined by reported fall frequency, suggesting a more objective measure of fall risk. The current study aimed to determine if the fall risk calculated by COPE velocity in children with CP is correlated with co-contraction index value in various muscle synergy groups. It was hypothesized that i) co-contraction index values will differ between high and low fall risk groups, ii) there will be preferential activation of different synergy groups within the high and low fall risk groups, and iii) there will be a negative and direct correlation between COPE velocity and co-contraction index values for all synergy groups. METHODS: Fall risk grouping was determined by average COPE velocity values calculated from previously reported fall frequency groups. Balance ability was determined by COPE measurements during a SLST on a force plate. Muscle synergy groups were determined by common muscle pairings at the hip, knee and ankle. Co-contraction indices were determined from linear envelopes plotted from muscle group EMG data. An independent t-test was run on muscle synergy groups between high and low fall risk groups. Nonparametric Analysis of Variance (ANOVA) and Tukey post-hoc tests were run on the high and low fall risk groups separately to determine differences in co-contraction index value within high and low fall risk groups. A Pearson correlation analyzed COPE velocity and co-contraction index value. RESULTS: No significant differences in muscle synergy between the high and low fall risk groups were found (p = 0.476, 0.076, 0.064, 0.364). The ANOVA and Tukey post-hoc tests for high fall risk group found significant differences in co-activation index value between the sagittal hip and frontal hip groups (p = 0.022) and sagittal hip and ankle groups (p = 0.016). Low fall risk group was found to have significant differences between the sagittal hip and frontal hip groups (p = 0.038) and frontal hip and knee groups (p = 0.012). Weak and negative correlations were found between COPE velocity and both knee and ankle groups (r = -0.309, -0.323, p = 0.059, 0.050). Negligible and insignificant correlations were found between frontal hip and sagittal hip synergies and COPE velocity ((r = 0.013, -0.068, p = 0.475, 0.367). CONCLUSION: There is insufficient evidence to claim that muscle group activations are different depending on fall risk grouped by COPE…

Subjects/Keywords: Cerebral Palsy; Muscle Synergy; Single Leg Stance; Fall; Center of Pressure Excursion; Electromyography; Biomechanics; Exercise Science; Kinesiotherapy; Medical Sciences; Motor Control; Musculoskeletal Diseases; Musculoskeletal System; Physical Therapy; Physiotherapy; Rehabilitation and Therapy

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

APA (6^th Edition):

Smith, B. L. (2018). MUSCLE SYNERGY DURING A SINGLE LEG STANDING TEST IN AMBULATORY CHILDREN WITH CEREBRAL PALSY. (Masters Thesis). University of Kentucky. Retrieved from https://uknowledge.uky.edu/khp_etds/51

Chicago Manual of Style (16^th Edition):

Smith, Brennan L. “MUSCLE SYNERGY DURING A SINGLE LEG STANDING TEST IN AMBULATORY CHILDREN WITH CEREBRAL PALSY.” 2018. Masters Thesis, University of Kentucky. Accessed March 06, 2021. https://uknowledge.uky.edu/khp_etds/51.

MLA Handbook (7^th Edition):

Smith, Brennan L. “MUSCLE SYNERGY DURING A SINGLE LEG STANDING TEST IN AMBULATORY CHILDREN WITH CEREBRAL PALSY.” 2018. Web. 06 Mar 2021.

Vancouver:

Smith BL. MUSCLE SYNERGY DURING A SINGLE LEG STANDING TEST IN AMBULATORY CHILDREN WITH CEREBRAL PALSY. [Internet] [Masters thesis]. University of Kentucky; 2018. [cited 2021 Mar 06]. Available from: https://uknowledge.uky.edu/khp_etds/51.

Council of Science Editors:

Smith BL. MUSCLE SYNERGY DURING A SINGLE LEG STANDING TEST IN AMBULATORY CHILDREN WITH CEREBRAL PALSY. [Masters Thesis]. University of Kentucky; 2018. Available from: https://uknowledge.uky.edu/khp_etds/51

Université de Montréal

15. He, Liang. Biceps brachii synergy and its contribution to target reaching tasks within a virtual cube.

Degree: 2020, Université de Montréal

URL: http://hdl.handle.net/1866/23537

Subjects/Keywords: membre supérieur; prothèses myoélectriques; biceps brachial; cube virtuel; synergie musculaire; électromyographie; cibles; upper limb; myoelectric prostheses; biceps brachii; virtual cube; muscle synergy; electromyography; targets; Engineering - Biomedical / Ingénierie - Biomédicale (UMI : 0541)

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

APA (6^th Edition):

He, L. (2020). Biceps brachii synergy and its contribution to target reaching tasks within a virtual cube. (Thesis). Université de Montréal. Retrieved from http://hdl.handle.net/1866/23537

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):

He, Liang. “Biceps brachii synergy and its contribution to target reaching tasks within a virtual cube.” 2020. Thesis, Université de Montréal. Accessed March 06, 2021. http://hdl.handle.net/1866/23537.

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

MLA Handbook (7^th Edition):

He, Liang. “Biceps brachii synergy and its contribution to target reaching tasks within a virtual cube.” 2020. Web. 06 Mar 2021.

Vancouver:

He L. Biceps brachii synergy and its contribution to target reaching tasks within a virtual cube. [Internet] [Thesis]. Université de Montréal; 2020. [cited 2021 Mar 06]. Available from: http://hdl.handle.net/1866/23537.

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

Council of Science Editors:

He L. Biceps brachii synergy and its contribution to target reaching tasks within a virtual cube. [Thesis]. Université de Montréal; 2020. Available from: http://hdl.handle.net/1866/23537

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

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Open Access Theses and Dissertations