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You searched for +publisher:"Indiana University" +contributor:("Koceja, David"). Showing records 1 – 2 of 2 total matches.

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Indiana University

1. Tahayori, Behdad. A novel therapy to regain control of spinal motoneurons in stroke survivors .

Degree: 2015, Indiana University

The purpose of this research was to demonstrate that hemiplegic stroke survivors possess the ability to modulate their H-reflex amplitude through exercise induced operant conditioning. To better understand the changes in the spinal cord associated with hemiplegic stroke, two important inhibitory spinal cord mechanisms, namely post activation depression (PAD) and Group I reciprocal inhibition (RI) were also examined. Examining PAD with conditioning-test intervals between 80 to 300 ms showed a substantial depression in the amplitude of the H-reflex in healthy individuals. In stroke patients there was significantly less inhibition at all intervals, with full recover of the H-reflex at the 300 ms interval. In healthy individuals conditioning the soleus H-reflex with common peroneal nerve stimulation caused an initial inhibitory phase at about 10 ms interval (D1 inhibition) and a second phase of inhibition at longer intervals (> 100 ms; D2 inhibition). In stroke patients, no statistically significant inhibition was observed, although partial interaction analysis suggested that D1 inhibition followed a pattern similar to that of healthy individuals. Finally, a three-week exercise induced operant conditioning program was examined in three stroke patients. All patients demonstrated success for down-regulating the amplitude of the soleus H-reflex. More importantly, after training all subjects demonstrated improvements in gait parameters. It is concluded that spinal cord inhibitory mechanisms are different between healthy controls and stroke patients, and that exercise induced operant conditioning is a promising method for regaining functional control of motoneurons. Advisors/Committee Members: Koceja, David (advisor), Port, Nicholas (advisor).

Subjects/Keywords: H-reflex; Operant Conditioning; Stroke

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

APA (6th Edition):

Tahayori, B. (2015). A novel therapy to regain control of spinal motoneurons in stroke survivors . (Thesis). Indiana University. Retrieved from http://hdl.handle.net/2022/19522

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

Chicago Manual of Style (16th Edition):

Tahayori, Behdad. “A novel therapy to regain control of spinal motoneurons in stroke survivors .” 2015. Thesis, Indiana University. Accessed March 29, 2020. http://hdl.handle.net/2022/19522.

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

MLA Handbook (7th Edition):

Tahayori, Behdad. “A novel therapy to regain control of spinal motoneurons in stroke survivors .” 2015. Web. 29 Mar 2020.

Vancouver:

Tahayori B. A novel therapy to regain control of spinal motoneurons in stroke survivors . [Internet] [Thesis]. Indiana University; 2015. [cited 2020 Mar 29]. Available from: http://hdl.handle.net/2022/19522.

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

Council of Science Editors:

Tahayori B. A novel therapy to regain control of spinal motoneurons in stroke survivors . [Thesis]. Indiana University; 2015. Available from: http://hdl.handle.net/2022/19522

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


Indiana University

2. Karp, Jason Roger. Lungs and Legs: Entrainment of Breathing to Locomotion in Highly-Trained Distance Runners .

Degree: 2010, Indiana University

Research has found that breathing is coordinated, or entrained, to the rhythm of locomotion, possibly conferring an economical advantage. Elite endurance athletes, whose ability to sustain high metabolic workloads sometimes results in exercise-induced hypoxemia (EIH) and expiratory flow limitation (FL), are a unique population in which to study this "lungs-legs" relationship. The purposes of this study were to examine the entrainment of breathing frequency to stride rate in elite distance runners during exercise at 70, 90, 100, and 110% of the ventilatory threshold (VT), to compare the degree of entrainment between % VT intensities, and to examine the relationship between entrainment and running economy. Given a sufficient number of entrained and non-entrained subjects, EIH and non-EIH subjects, and/or FL and non-FL subjects, secondary purposes were to compare economy at each intensity between entrained and non-entrained groups and to compare the proportion of subjects exhibiting entrainment and the percent entrainment between EIH and non-EIH groups and between FL and non-FL groups. Fifteen male distance runners performed a maximal oxygen consumption (VO2max) test and a locomotor-respiratory coupling test, during which running economy was also determined. EIH and FL were determined by pulse oximetry and flow-volume measurements during the VO2max test, respectively. Only 5 subjects exhibited EIH and 2 exhibited FL, precluding group comparisons regarding entrainment. All subjects entrained breathing to stride rate, precluding group comparisons regarding running economy. The step-to-breath ratio decreased with increasing intensity up to 100% VT (2.75 ± 0.58, 2.32 ± 0.52, and 2.14 ± 0.56; p<0.05) but did not decrease further at 110% VT (2.16 ± 0.48). Subjects most often utilized 5:3 and 2:1 step-to-breath ratios. Percent entrainment during inspiration at 70% VT was less than at 100 and 110% VT (13.1 ± 7.8, 23.1 ± 14.5, 28.4 ± 16.5, and 30.8 ± 14.9% for 70, 90, 100, and 110% VT, respectively; p<0.01), but did not change with intensity during expiration (30.8 ± 12.6, 27.9 ± 10.0, 20.8 ± 7.3, and 25.7 ± 11.2%, respectively). At all intensities, percent entrainment was significantly greater than a chance occurrence. Correlations between the degree of entrainment and running economy were not significant at any intensity. Entrainment of breathing to locomotion is a physiological phenomenon in elite distance runners, which is largely not influenced by intensity, but can differ between inspiration and expiration. Furthermore, running economy is not associated with entrainment. The methods used to quantify entrainment need additional research and critical reflection. Advisors/Committee Members: Robergs, Robert (advisor), Koceja, David (advisor).

Subjects/Keywords: Running; Breathing; Stride Rate; Entrainment; Running Economy

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

APA (6th Edition):

Karp, J. R. (2010). Lungs and Legs: Entrainment of Breathing to Locomotion in Highly-Trained Distance Runners . (Thesis). Indiana University. Retrieved from http://hdl.handle.net/2022/7426

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

Chicago Manual of Style (16th Edition):

Karp, Jason Roger. “Lungs and Legs: Entrainment of Breathing to Locomotion in Highly-Trained Distance Runners .” 2010. Thesis, Indiana University. Accessed March 29, 2020. http://hdl.handle.net/2022/7426.

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

MLA Handbook (7th Edition):

Karp, Jason Roger. “Lungs and Legs: Entrainment of Breathing to Locomotion in Highly-Trained Distance Runners .” 2010. Web. 29 Mar 2020.

Vancouver:

Karp JR. Lungs and Legs: Entrainment of Breathing to Locomotion in Highly-Trained Distance Runners . [Internet] [Thesis]. Indiana University; 2010. [cited 2020 Mar 29]. Available from: http://hdl.handle.net/2022/7426.

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

Council of Science Editors:

Karp JR. Lungs and Legs: Entrainment of Breathing to Locomotion in Highly-Trained Distance Runners . [Thesis]. Indiana University; 2010. Available from: http://hdl.handle.net/2022/7426

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

.