Document Detail

Adaptation to a visuomotor shift depends on the starting posture.
MedLine Citation:
PMID:  12163546     Owner:  NLM     Status:  MEDLINE    
Previous studies have shown that human subjects can adapt to a new visuomotor relationship that depends on the trajectory of the arm. However, these studies have not distinguished between hand- and joint-based learning models. We have examined whether different endpoint kinematics are necessary to obtain a differential visuomotor shift. The joint trajectory was varied by changing the initial posture, while maintaining a similar finger trajectory. After learning, maximum after-effects were found when movement began with the posture used during exposure to the visuomotor shift and decreased with the difference between initial and trained posture. This was shown to be independent of the final posture attained. Our results show that adaptation to a visual remapping cannot be due to the recoding of a desired final posture and depends on the arm trajectory in joint space.
Pierre Baraduc; Daniel M Wolpert
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Publication Detail:
Type:  Journal Article; Research Support, Non-U.S. Gov't    
Journal Detail:
Title:  Journal of neurophysiology     Volume:  88     ISSN:  0022-3077     ISO Abbreviation:  J. Neurophysiol.     Publication Date:  2002 Aug 
Date Detail:
Created Date:  2002-08-06     Completed Date:  2002-09-23     Revised Date:  2006-11-15    
Medline Journal Info:
Nlm Unique ID:  0375404     Medline TA:  J Neurophysiol     Country:  United States    
Other Details:
Languages:  eng     Pagination:  973-81     Citation Subset:  IM; S    
Sobell Department of Neurophysiology, Institute of Neurology, University College London, United Kingdom.
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MeSH Terms
Joints / physiology
Learning / physiology
Psychomotor Performance / physiology*
Visual Perception / physiology*

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