Journal
MUSCLE & NERVE
Volume 32, Issue 2, Pages 170-178Publisher
WILEY
DOI: 10.1002/mus.20343
Keywords
arm; rehabilitation; strength; stroke; synergy
Categories
Funding
- NICHD NIH HHS [R01 HD039343-04, R01 HD39343, R01 HD039343] Funding Source: Medline
- PHS HHS [H133G980063] Funding Source: Medline
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Unlike individuals with mild stroke, individuals with severe stroke are constrained to stereotypical movement patterns attributed to abnormal coupling of shoulder abductors with elbow flexors, and shoulder adductors with elbow extensors. Whether abnormal muscle coactivation and associated joint torque patterns can be changed in this population is important to determine given that it bears on the development of effective rehabilitation interventions. Eight subjects participated in a protocol that was designed to reduce abnormal elbow/shoulder joint torque coupling by training them to generate combinations of isometric elbow and shoulder joint torques away from the constraining patterns. After training, subjects demonstrated a significant reduction in abnormal torque coupling and a subsequent significant increase in ability to generate torque patterns away from the abnormal pattern. We suggest the rapid time-course of these changes reflects a residual capacity of the central nervous system to adapt to a novel behavioral training environment.
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