Distinct modulation of mu and beta rhythm desynchronization during observation of embodied fake hand rotation
Distinct modulation of mu and beta rhythm desynchronization during observation of embodied fake hand rotation
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DOI：
10.1016/j.neuropsychologia.2021.107952
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发表时间：
2021-07-13
期刊：
影响因子：
2.6
通讯作者：
Ohki, Yukari
中科院分区：
文献类型：
--
作者：
Shibuya, Satoshi;Unenaka, Satoshi;Ohki, Yukari
橡胶手错觉（rubber hand illusion，RHI）是一种现象，参与者将假手识别为自己的手。研究已经检查了在RHI后观察假手运动对大脑感觉运动活动的影响，尽管结果仍然存在争议。为了解决这些差异，我们使用脑电图（EEG）研究了RHI后观察假手旋转对感觉运动mu（mu：8-13 Hz）和beta（beta：15-25 Hz）节律事件相关去兴奋化（ERD）的影响。问卷调查结果和本体感觉漂移显示，RHI发生在参与者时，他们的无形手和假有形手同步抚摸，但不异步抚摸。在运动观察期间从EEG数据的独立分量（IC）聚类确定了三个IC簇，包括右感觉运动，左感觉运动和左枕叶簇。在右侧感觉运动簇中，我们观察到在假手旋转过程中mu和beta ERD的明显调制。对假手的虚假所有权增强了mu ERD，但相反地减弱了beta ERD。此外，μ ERD的程度与本体感受漂移相关，但与问卷评分无关，而β ERD则获得匡威的结果。在左侧感觉运动簇中没有检测到所有权依赖性ERD调制。Alpha（alpha：8-13 Hz）的节奏ERD的左枕叶集群是在同步条件下比在异步条件下更小，但α ERD与问卷评分或漂移不相关。这些研究结果表明，观察体现假手旋转诱导不同的皮层处理的感觉运动脑区。
The rubber hand illusion (RHI) is a phenomenon whereby participants recognize a fake hand as their own. Studies have examined the effects of observing fake hand movements after the RHI on brain sensorimotor activity, although results remain controversial. To address these discrepancies, we investigated the effects of observation of fake hand rotation after the RHI on sensorimotor mu (mu: 8-13 Hz) and beta (beta: 15-25 Hz) rhythm event-related desynchronization (ERD) using electroencephalography (EEG). Questionnaire results and proprioceptive drift revealed that the RHI occurred in participants when their invisible hand and fake visible hand were stroked synchronously but not during asynchronous stroking. Independent component (IC) clustering from EEG data during movement observation identified three IC clusters, including the right sensorimotor, left sensorimotor, and left occipital cluster. In the right sensorimotor cluster, we observed distinct modulation of mu and beta ERD during fake hand rotation. Illusory ownership over the fake hand enhanced mu ERD but inversely attenuated beta ERD. Further, the extent of mu ERD correlated with proprioceptive drift, but not with questionnaire ratings, whereas the converse results were obtained for beta ERD. No ownership-dependent ERD modulation was detected in the left sensorimotor cluster. Alpha (alpha: 8-13 Hz) rhythm ERD of the left occipital cluster was smaller in the synchronous condition than in the asynchronous condition, but alpha ERD was not correlated with questionnaire rating or drift. These findings suggest that observing embodied fake hand rotation induces distinct cortical processing in sensorimotor brain areas.