Power Spectrum Analyses of Electromyographic ActivityDiscriminators in the Differential Assessment of Patients with Chronic Low‐Back Pain
作者:
H.,
BIEDERMANN G.,
SHANKS W.,
FORREST J.,
期刊:
Spine
(OVID Available online 1991)
卷期:
Volume 16,
issue 10
页码: 1179-1184
ISSN:0362-2436
年代: 1991
出版商: OVID
关键词: fatigue;electromyography;back pain;fiber composition
数据来源: OVID
摘要:
Some parameters of the electromyographic power spectrum of the paraspinal muscles were recorded and analyzed with regard to their ability to discriminate between normal controls and patients with back pain classified as “avoiders” or “confronters” by their responses to the Pain Behavior Checklist. In terms of the activity of the multifidus muscle, the avoider group displayed spectral changes towards lower frequencies, reduced variability in the density spectrum, and higher values of estimated initial frequencies. Measures of the activity of the iliocos- talls lumborum did not contribute in any significant way to these group differences. Based on these findings, and on the available literature concerning the histology and physiology of paraspinal muscles, it is proposed that the observed characteristics of the avoider group may be due to a reduced ratio of slow twitch to fast twitch muscle fibers in the multifidus.
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