| Effects of wrist tendon vibration on targeted upper-arm movements in poststroke hemiparesis. | |
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MedLine Citation:
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PMID: 20921324 Owner: NLM Status: In-Process |
Abstract/OtherAbstract:
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BACKGROUND: Impaired motor control of the upper extremity after stroke may be related to lost sensory, motor, and integrative functions of the brain. Artificial activation of sensory afferents might improve control of movement by adding excitatory drive to sensorimotor control structures. The authors evaluated the effect of wrist tendon vibration (TV) on paretic upper-arm stability during point-to-point planar movements. METHODS: TV (70 Hz) was applied to the forearm wrist musculature of 10 hemiparetic stroke patients as they made center-out planar arm movements. End-point stability, muscle activity, and grip pressure were compared as patients stabilized at the target position for trials completed before, during, and after the application of the vibratory stimulus. RESULTS: Prior to vibration, hand position fluctuated as participants attempted to maintain the hand at the target after movement termination. TV improved arm stability, as evidenced by decreased magnitude of hand tangential velocity at the target. Improved stability was accompanied by a decrease in muscle activity throughout the arm as well as a mean decrease in grip pressure. CONCLUSIONS: These results suggest that vibratory stimulation of the distal wrist musculature enhances stability of the proximal arm and can be studied further as a mode for improving end-point stability during reaching in hemiparetic patients. |
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Authors:
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Megan O Conrad; Robert A Scheidt; Brian D Schmit |
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Publication Detail:
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Type: Journal Article; Research Support, N.I.H., Extramural Date: 2010-10-04 |
Journal Detail:
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Title: Neurorehabilitation and neural repair Volume: 25 ISSN: 1552-6844 ISO Abbreviation: Neurorehabil Neural Repair Publication Date: 2011 Jan |
Date Detail:
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Created Date: 2011-01-03 Completed Date: - Revised Date: - |
Medline Journal Info:
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Nlm Unique ID: 100892086 Medline TA: Neurorehabil Neural Repair Country: United States |
Other Details:
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Languages: eng Pagination: 61-70 Citation Subset: IM |
Affiliation:
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Department of Biomedical Engineering, Marquette University, Milwaukee, WI 53201-1881, USA. |
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Descriptor/Qualifier:
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| Grant Support | |
ID/Acronym/Agency:
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R01-NS052509/NS/NINDS NIH HHS |
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