Document Detail


Modification of motor output to compensate for unanticipated load conditions during rapid voluntary movements.
MedLine Citation:
PMID:  3719473     Owner:  NLM     Status:  MEDLINE    
Abstract/OtherAbstract:
Mechanisms responsible for load compensation during fast voluntary movements were investigated in 20 normal subjects trained to carry out rapid wrist flexions against a standard load. When an unanticipated increase in load occurred, there was a compensatory increase in agonist EMG and decrease in antagonist EMG. Unanticipated decreases in load produced reciprocal changes with a decrease in agonist EMG and an increase in antagonist EMG. The latency of these EMG changes was quite short and compatible with a spinal reflex mechanism rather than a long loop response. The results suggest that mechanisms exist at the spinal level to allow rapid modification of motor programs when unanticipated load conditions are encountered on initiation of movement.
Authors:
R G Lee; G E Lucier; B E Mustard; D G White
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Publication Detail:
Type:  Journal Article; Research Support, Non-U.S. Gov't    
Journal Detail:
Title:  The Canadian journal of neurological sciences. Le journal canadien des sciences neurologiques     Volume:  13     ISSN:  0317-1671     ISO Abbreviation:  Can J Neurol Sci     Publication Date:  1986 May 
Date Detail:
Created Date:  1986-08-12     Completed Date:  1986-08-12     Revised Date:  2006-11-15    
Medline Journal Info:
Nlm Unique ID:  0415227     Medline TA:  Can J Neurol Sci     Country:  CANADA    
Other Details:
Languages:  eng     Pagination:  97-102     Citation Subset:  IM; S    
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MeSH Terms
Descriptor/Qualifier:
Adult
Biomechanics
Electromyography
Feedback
Humans
Middle Aged
Motor Neurons / physiology
Movement*
Muscles / physiology*
Reaction Time / physiology
Reflex, Stretch
Sensation / physiology
Spinal Cord / physiology*

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine


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