Cortical correlates of illusory hand movement perception in humans:: A MEG study
Cortical correlates of illusory hand movement perception in humans:: A MEG study
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DOI：
10.1016/j.brainres.2006.08.124
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发表时间：
2006-11-22
期刊：
影响因子：
2.9
通讯作者：
Roll, Jean-Pierre
中科院分区：
文献类型：
--
作者：
Casini, Laurence;Romaiguere, Patricia;Roll, Jean-Pierre
本研究的目的是探讨大脑皮层活动与知觉的错觉手运动引起的肌腱振动使用脑磁图（MEG）在人类。我们比较了两种条件下的刺激，“错觉”和“无错觉”的MEG反应。在“错觉”条件下，施加在右手腕屈肌和伸肌群的肌腱上的不同频率的共振诱发了手的错觉运动。在“无错觉”条件下，两组肌腱以相同的频率传递共振，并且没有感觉到运动。在两种实验条件下，在四个时间窗口中的每一个中识别出等效电流偶极（ECD）：0-200 ms，200 - 400 ms，400-600 ms和600-800 ms。我们的数据显示，在两种条件下，S1，上级顶回和缘上回的激活相似，而辅助运动区，M1和左侧角回仅在“错觉”条件下活动。我们的研究结果证实了后顶叶区以及运动区在动觉感觉产生中的作用。角回和初级运动区之间的相互作用发生约400英寸后，开始的刺激的假设进行了讨论。(c)2006 Elsevier B. V.保留所有权利。
The present study aimed to investigate cortical activity associated with perception of illusory hand movements elicited by tendon vibration using magnetoencephalography (MEG) in humans. We compared MEG responses in two conditions of stimulation, "illusion" and "no illusion". In the "illusion" condition, covibration at different frequencies applied on the tendons of the right wrist flexor and extensor muscle groups evoked illusory movements of the hand. In the "no illusion" condition, covibration was delivered at the same frequency on both tendon groups and no movement was perceived. In both experimental conditions, equivalent current dipoles (ECD) were identified in each of four time windows: 0-200 ms, 200400 ms, 400-600 ms and 600-800 ms. Our data showed similar activation in S1, superior parietal gyrus and supramarginal gyrus in both conditions, whereas the supplementary motor area, M1 and the left angular gyrus were found active in the "illusion" condition only. Our results confirmed the role of posterior parietal areas as well as motor areas in the arising of kinesthetic sensations. The hypothesis of an interaction between the angular gyrus and the primary motor area occurring about 400 ins after the beginning of the stimulation is discussed. (c) 2006 Elsevier B.V. All rights reserved.