The significance of coherency between EEG and EMG in motor control

我们研究了MU放电的方式在这两个科目谁表现出显着的皮质-肌肉的连贯性和科目谁表现出不显着的连贯性。我们比较了两类被试的皮质-肌肉一致性和皮质驱动与MU活动之间的一致性。它已被证明，即使MU没有构建时间合奏，如成组放电，单个MU与皮层驱动是一致的。我们通过计算皮层驱动瞬时相位分布对MU放电定时的圆方差，定量评估MU对皮层驱动相位的依赖性。我们发现，随着力量水平的增加，MU逐渐被皮质驱动的节奏所捕获。此外，通过使用皮层驱动相的ISIH，还显示了间歇性MU放电。我们已经展示了MU的锁相活动和间歇性放电的证据，并揭示了神经肌肉净活动和单个运动单位放电之间的因果关系。

We investigated the manner of MU discharge in both subjects who showed significant cortico-muscular coherence and subjects who showed non-significant coherence. We compared the two types of subjects about cortico-muscular coherence and coherence between cortical drive and MU activity. It has been shown that, even if MUs did not construct temporally ensemble such as grouped discharge, single MU was coherent with cortical drive. We evaluated dependency of MU on phase of cortical drive quantitatively by calculating circular variance of instantaneous phase distribution of cortical drive on MU firing timing. We found that MU was gradually being entrapped by the rhythm of the cortical drive as the level of force increased. Furthermore, by ISIH using phase of cortical drive, intermittent MU discharge has also demonstrated. We have shown the evidence of phase-locked activity and intermittent discharge of MU, and revealed the causal relationship between net neuromuscular activity and individual motor unit firing.