CHANGES IN THE POWER SPECTRUM OF THE SURFACE ELECTROMYOGRAM OF THE HUMAN MASSETER MUSCLE DUE TO LOCAL MUSCULAR FATIGUE

被引:37
作者
NAEIJE, M
ZORN, H
机构
关键词
D O I
10.1016/0003-9969(81)90038-8
中图分类号
R78 [口腔科学];
学科分类号
1003 ;
摘要
Eight subjects were asked to clench as long as possible in the intercuspal position while keeping the electrical activity of the masseter muscles at 50% of the maximum electrical activity. During the fatiguing process, the mean power frequency of the power spectrum of the masseter electromyogram shifted from (239 .+-. 31) Hz at the beginning of the experiment to (172 .+-. 46) Hz at the end. The endurance time varied from 40-240 s. There was a negative correlation between the shift in power spectrum and the endurance time. [Pain in the masticatory muscles of patients with myofacial-pain dysfunction is probably due to hyperactivity of the muscle. Parafunctional habits such as clenching and bruxism are common activities of these muscles. A study of the effects of hyperactivity in the masticatory muscle might give more insight into the myofacial-pain dysfunction syndrome.].
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页码:409 / 412
页数:4
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