AbstractWhen the force of muscle contraction is increased, the amplitude of the EMG envelope (ENAMP) increases. The ENAMP is usually assessed subjectively and its value in EMG analysis has been established. In this article we describe a method to make automatic measurements of the ENAMP. This method was tested on recordings of the EMG interference pattern (IP) from the biceps muscle of normal subjects. Normal values of this feature in the biceps muscle are described. There was a good concordance between the ENAMP measurements made by subjectve assessment and by automatic analysis and the ENAMP values correlated strongly with a previously described feature of the IP called the upper centile amplitude. We infer that ENAMP is a robust feature of the IP that reflects the amplitude of the largest MUAP in the IP.
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机译:摘要当肌肉收缩力增加时,肌电包膜(ENAMP)的振幅增加。ENAMP 通常是主观评估的,其在 EMG 分析中的价值已经确定。在本文中,我们将介绍一种对ENAMP进行自动测量的方法。该方法在正常受试者二头肌的肌电图干扰模式 (IP) 记录上进行了测试。描述了肱二头肌中这一特征的正常值。通过受试者评估和自动分析进行的ENAMP测量之间存在良好的一致性,并且ENAMP值与先前描述的IP特征(称为上百分位数振幅)密切相关。我们推断 ENAMP 是 IP 的一个鲁棒特性,它反映了 IP 中最大 MUAP 的振幅。
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