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Sensorimotor integration in the human spinal cordClair, Joanna 11 1900 (has links)
In this thesis sensorimotor integration in the human spinal cord was investigated in the intact (Chapters 2 and 3) and injured nervous systems (Chapter 4-stroke; Chapter 5-spinal cord injury (SCI)). In Chapter 2, I characterized a short-latency reflex pathway between sensory receptors of the lower leg and the erector spinae (ES) muscles of the lower back that may play a role in the maintenance of posture and balance. The ES reflexes were evoked bilaterally by taps applied to the Achilles tendon and were modulated by task. Furthermore, these reflexes involved a larger contribution from cutaneous receptors in the lower limb, rather than muscle spindles. In Chapter 3, I investigated changes in reflex transmission along the H-reflex pathway throughout 10 s trains of neuromuscular electrical stimulation (NMES) using physiologically relevant frequencies (5-20 Hz) and during functionally relevant tasks (sitting and standing) and background contraction amplitudes (up to 20% MVC). The results of this study revealed strong post-activation depression of reflex amplitudes, followed by significant recovery during the stimulation, both of which were influenced by stimulation frequency and background contraction amplitude, but not task. During 10 Hz stimulation, reflex amplitudes showed complete recovery (i.e. back to their initial values), and at times, complete recovery occurred by the third reflex in the train. These results demonstrate that transmission along the H-reflex pathway is modulated continuously during periods of repetitive input. In Chapters 4 and 5, I studied the extent to which a novel stimulation protocol that incorporated wide pulse widths (1 ms) and high frequencies (up to 100 Hz) (wide-pulse NMES; WP-NMES), could enhance electrically-evoked contractions through a central contribution in individuals with stroke or SCI. This central effect arises from the electrical activation of sensory axons, which in turn, reflexively recruit motoneurons in the spinal cord. After stroke, contractions evoked by WP-NMES were larger in the paretic arm than the non-paretic arm. After SCI, transmission along the H-reflex pathway was observed throughout trains of WP-NMES; direct evidence of a central contribution. These results suggest that maximizing the central contribution during WP-NMES may be useful for maintaining muscle quality after neurological injury.
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Body music an examination of the physical and mental similarities of sports performance and string music performance /Curry, Nick. January 2006 (has links)
Thesis (D. Music)--Northwestern University, 2006. / Includes bibliographical references (leaves 132-136).
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Dynamics of embodied dissociated cortical cultures for the control of hybrid biological robots.Bakkum, Douglas James. January 2007 (has links)
Thesis (Ph. D.)--Mechanical Engineering, Georgia Institute of Technology, 2008. / Committee Chair: Steve M. Potter; Committee Member: Eric Schumacher; Committee Member: Robert J. Butera; Committee Member: Stephan P. DeWeerth; Committee Member: Thomas D. DeMarse.
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Hand-eye correlation an arbitrary sensorimotor contingency can alter visual sensitivity : a dissertation /Richters, David. January 1900 (has links)
Thesis (Ph. D)--Northeastern University, 2008. / Title from title page (viewed March 25, 2009). Graduate School of Arts and Sciences, Dept. of Psychology. Includes bibliographical references (p. 154-161).
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Neural network models of the brain mechanisms of bilateral coordination /Farrar, David Scott, January 1999 (has links)
Thesis (Ph. D.)--University of California, San Diego, 1999. / Vita. Includes bibliographical references (leaves 86-90).
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Sensorimotor integration and the role of the cercal system in the reproductive behavior of the cricket, Acheta domesticusSnell, Lewis Casbeer. January 2005 (has links)
Thesis (Ph. D.)--Miami University, Dept. of Zoology, 2005. / Title from second page of PDF document. Includes bibliographical references (p. 100-108).
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Denervation facilitates motor skills learning with the "unaffected" forelimb in adult rats with unilateral sensorimotor cortex lesions /Bury, Scott Douglas, January 2002 (has links)
Thesis (Ph. D.)--University of Washington, 2002. / Vita. Includes bibliographical references (leaves 102-125).
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Computational and psychophysical studies of goal-directed arm movementsLiu, Dan, January 2008 (has links)
Thesis (Ph. D.)--University of California, San Diego, 2008. / Title from first page of PDF file (viewed June 1, 2009). Available via ProQuest Digital Dissertations. Vita. Includes bibliographical references (p. 124-131).
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Finding the right note cognitive and motor strategies for pitch performance accuracy in skilled cellists /Chen, Jessie, January 2005 (has links)
Thesis (Ph. D)--University of Oregon, 2005. / Includes bibliographical references (leaves 89-94). Also available online (PDF file) by a subscription to the set or by purchasing the individual file.
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Surgical reconstruction of the lingual and hypoglossal nerves in oropharyngeal cancer anterior oral cavity sensorimotor and quality of life outcomes /Elfring, Tracy Tamiko. January 1900 (has links)
Thesis (M.Sc.)--University of Alberta, 2010. / A thesis submitted to the Faculty of Graduate Studies and Research in partial fulfillment of the requirements for the degree of Master of Science in Speech-Language Pathology, Department of Speech Pathology and Audiology. Title from pdf file main screen (viewed on July 25, 2010). Includes bibliographical references.
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