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.

我们调查了表现出显着皮质肌肉一致性的受试者和表现出不显着一致性的受试者的 MU 放电方式。我们比较了两种类型的受试者的皮质肌肉一致性以及皮质驱动和 MU 活动之间的一致性。研究表明，即使 MU 没有构建诸如分组放电之类的时间整体，单个 MU 也与皮质驱动保持一致。我们通过计算皮质驱动瞬时相位分布对 MU 放电时间的循环方差来定量评估 MU 对皮质驱动相位的依赖性。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束缚。此外，通过使用皮质驱动阶段的 ISIH，还证明了间歇性 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，并揭示了净神经肌肉活动与个体运动单位放电之间的因果关系。