Document Detail

Automatic analysis of the electromyographic interference pattern. Part I: Development of quantitative features.
MedLine Citation:
PMID:  3724789     Owner:  NLM     Status:  MEDLINE    
We have developed three new features of the electromyographic interference pattern (IP), based on the turns and amplitude of the signal, to quantitate some of the features of the IP that are usually assessed subjectively by an electromyographer. The activity measures the fullness of the IP. The upper centile amplitude (UCA) defines the upper limit of the maximum peak-to-peak amplitude of the motor unit action potentials (MUAPs) contained in the IP. The number of small segments (NSS) measures the complexity of the IP, which is a reflection of the polyphasicity of the component MUAPs. The activity and the logarithm of the UCA correlate strongly with the force of muscle contraction at which the IP is measured. The NSS initially increases with the force of contraction and becomes relatively constant at higher force levels. The normal values of these features and the interpretation of their relationships are described in companion papers.
S D Nandedkar; D B Sanders; E V Stålberg
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Publication Detail:
Type:  Journal Article; Research Support, Non-U.S. Gov't    
Journal Detail:
Title:  Muscle & nerve     Volume:  9     ISSN:  0148-639X     ISO Abbreviation:  Muscle Nerve     Publication Date:  1986 Jun 
Date Detail:
Created Date:  1986-08-11     Completed Date:  1986-08-11     Revised Date:  2006-11-15    
Medline Journal Info:
Nlm Unique ID:  7803146     Medline TA:  Muscle Nerve     Country:  UNITED STATES    
Other Details:
Languages:  eng     Pagination:  431-9     Citation Subset:  IM    
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MeSH Terms
Action Potentials
Automatic Data Processing
Electromyography / methods*
Middle Aged
Muscle Contraction
Muscles / physiology*

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

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