Non-invasive analysis of recruitment properties of human motor units using electrical muscle stimulation

本研究的目的是测试是否可以通过使用肌肉电刺激非侵入性地确定人类运动单位的募集特性。具体地说，一个单一的电脉冲施加到休息肌肉之前和之后的6-s自愿力的生产，然后“增强”的电诱发的收缩反应，由于自愿力的生产被确定。结果表明，增强的幅度代表募集性质的快缩肌纤维在随意肌肉收缩预测从“大小原则”。

The purpose of this study was to test whether recruitment properties of human motor units can be non-invasively determined by using electrical muscle stimulation. Specifically, a single electrical pulse was applied to the resting muscle before and after a 6-s voluntary force production and then the "potentiation" of electrically evoked contractile response due to the voluntary force production was determined. The results suggest that the magnitude of potentiation represents the recruitment properties of fast-twitch muscle fibers during voluntary muscle contraction predicted from the "size principle".