肌肉疲劳和恢复过程中肌电图和复合肌肉动作电位的功率谱分析。
Power spectral analysis of electromyogram and compound muscle action potential during muscle fatigue and recovery.
作者信息
Mills K R
出版信息
J Physiol. 1982 May;326:401-9. doi: 10.1113/jphysiol.1982.sp014201.
Abstract
- The power spectral changes of the voluntary electromyogram (e.m.g.) and of the compound muscle action potential (c.m.a.p.) evoked by supramaximal nerve stimulation have been compared in fatigue and recovery of human voluntary muscle contraction. 2. The mean power frequency (m.p.f.) of the voluntary e.m.g. and that of the c.m.a.p. are similar during fatigue. Power spectral shift can be largely accounted for by change in shape of muscle action potentials. 3. The recovery rates of force and action potential amplitude are similar, being half complete at 30 s. M.p.f. and relaxation rate recover more slowly, being half complete at 3 min. 4. It is suggested that the recovery of power spectral changes is dependent on the metabolic state of the muscle.
摘要
- 已对最大刺激神经诱发的随意肌电图（e.m.g.）和复合肌肉动作电位（c.m.a.p.）在人体随意肌收缩疲劳和恢复过程中的功率谱变化进行了比较。2. 随意e.m.g.的平均功率频率（m.p.f.）和c.m.a.p.的平均功率频率在疲劳期间相似。功率谱移位在很大程度上可由肌肉动作电位形状的变化来解释。3. 力量和动作电位幅度的恢复速率相似，在30秒时完成一半。m.p.f.和松弛速率恢复得更慢，在3分钟时完成一半。4. 有人提出，功率谱变化的恢复取决于肌肉的代谢状态。
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