Document Detail

Modification of motor output to compensate for unanticipated load conditions during rapid voluntary movements.
MedLine Citation:
PMID:  3719473     Owner:  NLM     Status:  MEDLINE    
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.
R G Lee; G E Lucier; B E Mustard; D G White
Related Documents :
17435123 - Uterine contractility: visualization of synchronization measures in two simultaneously ...
6726663 - Subvocal motor activity and contextual processing.
489833 - A theoretical study of the effects of various laryngeal configurations on the acoustics...
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    
Export Citation:
APA/MLA Format     Download EndNote     Download BibTex
MeSH Terms
Middle Aged
Motor Neurons / physiology
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

Previous Document:  Spinal cord blood flow measured with microspheres following spinal cord injury in the rat.
Next Document:  Learning to deal with drug-dependent patients: one physician's reflections.