Document Detail


Effect of the synchronization of the discharges of single motor units for the formation of the summated electromyogram.
MedLine Citation:
PMID:  3618257     Owner:  NLM     Status:  MEDLINE    
Abstract/OtherAbstract:
The monosynaptic electromyographic reflex (EMG) response to muscle stretching represents a synchronized discharge from the single motor units (MUs). The role of this synchronization, taking into account the effect of the subsequent voluntary activity, has been investigated by calculating the probabilities for the appearance of impulse from a single MU for consecutive 10 ms time intervals. Experimental data on the firing of the single MUs under stationary conditions and before the front of the summated EMG for m. triceps surae are used. The results obtained are compared with the experimental data on the interaction of the stretch reflex and the voluntary movement in response to the stretch. It is shown that the synchronization in itself cannot explain the later responses in the EMG, which are with latencies longer than the latency of the monosynaptic reflex, but shorter than the reaction time of the subsequent voluntary activity.
Authors:
A Kossev
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Publication Detail:
Type:  Journal Article    
Journal Detail:
Title:  Acta physiologica et pharmacologica Bulgarica     Volume:  13     ISSN:  0323-9950     ISO Abbreviation:  Acta Physiol Pharmacol Bulg     Publication Date:  1987  
Date Detail:
Created Date:  1987-09-24     Completed Date:  1987-09-24     Revised Date:  2004-11-17    
Medline Journal Info:
Nlm Unique ID:  7512568     Medline TA:  Acta Physiol Pharmacol Bulg     Country:  BULGARIA    
Other Details:
Languages:  eng     Pagination:  63-70     Citation Subset:  IM    
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MeSH Terms
Descriptor/Qualifier:
Electromyography
Electrophysiology
Humans
Mathematics
Motor Neurons / physiology*
Muscle Contraction
Muscles / innervation

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