Document Detail

Relationship between electrical and mechanical properties of motor units.
MedLine Citation:
PMID:  2341847     Owner:  NLM     Status:  MEDLINE    
In six healthy volunteers, the size of the motor unit action potential (MUAP) was related to its contractile behaviour. Electrical activity was determined by measuring amplitude and area of the potential, using the macro electromyography (EMG) technique. The mechanical response was characterised by contraction time, twitch force and relaxation time, recorded with the spike triggered averaging technique. With increasing tension of the whole muscle corresponding to an increasing threshold, the force of single units enlarged exponentially compared to their EMG. There was only a weak relationship between contraction time and electrical activity and none between EMG and relaxation time.
T Vogt; W A Nix; B Pfeifer
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Publication Detail:
Type:  Journal Article; Research Support, Non-U.S. Gov't    
Journal Detail:
Title:  Journal of neurology, neurosurgery, and psychiatry     Volume:  53     ISSN:  0022-3050     ISO Abbreviation:  J. Neurol. Neurosurg. Psychiatr.     Publication Date:  1990 Apr 
Date Detail:
Created Date:  1990-06-25     Completed Date:  1990-06-25     Revised Date:  2009-11-18    
Medline Journal Info:
Nlm Unique ID:  2985191R     Medline TA:  J Neurol Neurosurg Psychiatry     Country:  ENGLAND    
Other Details:
Languages:  eng     Pagination:  331-4     Citation Subset:  IM    
Department of Neurology, University of Mainz, West Germany.
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MeSH Terms
Action Potentials / physiology
Middle Aged
Motor Neurons / physiology*
Muscle Contraction / physiology
Muscle Relaxation / physiology
Muscles / physiology*

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