On the shape of the normal turns‐amplitude cloud
作者:
Sanjeev D. Nandedkar,
Donald B. Sanders,
Erik V. Stalberg,
期刊:
Muscle&Nerve
(WILEY Available online 1991)
卷期:
Volume 14,
issue 1
页码: 8-13
ISSN:0148-639X
年代: 1991
DOI:10.1002/mus.880140103
出版商: Wiley Subscription Services, Inc., A Wiley Company
关键词: turns and amplitude;interference pattern;normal values;force measurement;quantitative EMG
数据来源: WILEY
摘要:
AbstractFactors that affect the shape of the so‐called “normal cloud” of the turns and amplitude measurements of the electromyographic interference pattern are investigated. As the force of voluntary contraction increase from low to moderate levels, the number of turns in the signal increase faster than does the mean amplitude change between turns. This results in a cloud that is concave downward. At higher force levels, the pattern is reversed. The overall shape of the cloud thus depends on the maximum effort at which recordings are made, which is determined by the procedure of muscle activ
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