Changes in functional coupling patterns during bimanual task performance
Changes in functional coupling patterns during bimanual task performance
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DOI：
10.1097/01.wnr.0000131009.44068.51
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发表时间：
2004-06-28
期刊：
影响因子：
1.7
通讯作者：
Brown, P
中科院分区：
文献类型：
--
作者：
Serrien, DJ;Brown, P
大脑皮层之间的功能相互作用可能涉及活动的同步，表现为脑电信号之间的一致性。然而，尽管当运动任务相互比较或休息时，脑电-脑电连贯性会发生变化，但几乎没有证据表明连贯性在动作中受到调节。为了解决这个问题，我们使用了一个双手抽屉打开任务，需要不对称的手部动作，并包括不同的运动阶段。在β频段(>；12-24赫兹)出现明显的脑电-脑电相干性调制，出现在运动时相。由于手的角色转换而导致的一致性差异主要在阿尔法频段(8-12赫兹)观察到。这些发现表明，跨区域的同步性在不同的任务执行中动态变化，与行为表现一致。
Functional interaction between cortical areas may involve synchronization of activities, manifest as coherence between EEG signals. However, although EEG-EEG coherence changes when motor tasks are compared to each other or rest, there is little evidence that coherence is modulated within an action. To address this issue we used a bimanual drawer-opening task necessitating asymmetrical hand actions and comprising distinct movement phases. Pronounced modulations in EEG-EEG coherence in the beta band (>12-24 Hz) occurred with movement phase. Differences in coherence due to a switch in role of the hands were mainly observed in the alpha band (8-12 Hz). These findings suggest that inter-regional synchronization changes dynamically across task execution in line with behavioral performance.