The significance of coherency between EEG and EMG in motor control

脑电图和肌电图一致性在运动控制中的意义

• 批准号: 20500464
• 负责人: KIMURA Akio
• 金额: $ 3万
• 依托单位: Keio University
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (C)
• 财政年份: 2008
• 资助国家: 日本
• 起止时间: 2008 至 2010
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-20500464/
• 关键词: 脳波; 筋電図; コヒーレンス; 運動単位; 発射; decomposition; 発射頻度; 分布; 性差; 身長; 年齢

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.

我们调查了皮质-肌肉一致性显著的受试者和无显著一致性的受试者的MU放电方式。我们比较了两类受试者的皮质-肌肉一致性以及皮质驱动力和MU活动之间的一致性。结果表明，即使MU不构成时间集合，如成组放电，单个MU与皮层驱动也是一致的。通过计算皮层驱动瞬时相位分布对MU激发时间的圆方差，定量评估了MU对皮层驱动相位的依赖关系。我们发现，随着作用力水平的增加，MU逐渐被皮质驱动的节奏所困。此外，使用皮质驱动相的ISIH也显示出间歇性的MU放电。我们已经证明了MU的锁相活动和间歇放电的证据，并揭示了神经肌肉净活动与单个运动单位放电之间的因果关系。