Mu rhythm (de)synchronization and EEG single-trial classification of different motor imagery tasks
Mu rhythm (de)synchronization and EEG single-trial classification of different motor imagery tasks
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DOI：
10.1016/j.neuroimage.2005.12.003
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发表时间：
2006-05-15
期刊：
影响因子：
5.7
通讯作者：
da Silva, F. H. Lopes
中科院分区：
文献类型：
--
作者：
Pfurtscheller, G.;Brunner, C.;da Silva, F. H. Lopes
我们用60个EEG电极研究了9名健全被试的脑电节律（mu节律）与右手、左手、脚和舌头运动想象的反应性。在手部运动想象过程中，所有受试者的手部韵律被阻断或不同步，而在足部或舌部运动想象过程中，大多数受试者的手部韵律被增强。最活跃成分的频率为11.7 Hz +/- 0.4（平均+/- SD）。非同步分量在10.9 Hz +/- 0.9处呈宽带状，中心位置居中；同步分量在12.0 Hz +/- 1.0处呈窄带状，频率较高。除了事件相关去同步（ERD）模式外，在至少一个或两个任务中诱发事件相关同步（ERS）模式时，基于单次脑电试验分类的四种运动想象任务之间的区分得到改善。这意味着这样的脑电图现象可以应用于仅仅由运动想象操作的多级别脑机接口（BCI）。(c) 2005爱思唯尔公司版权所有。
We studied the reactivity of EEG rhythms (mu rhythms) in association with the imagination of right hand, left hand, foot, and tongue movement with 60 EEG electrodes in nine able-bodied subjects. During hand motor imagery, the hand mu rhythm blocked or desynchronized in all subjects, whereas an enhancement of the hand area mu rhythm was observed during foot or tongue motor imagery in the majority of the subjects. The frequency of the most reactive components was 11.7 Hz +/- 0.4 (mean +/- SD). While the desynchronized components were broad banded and centered at 10.9 Hz +/- 0.9, the synchronized components were narrow banded and displayed higher frequencies at 12.0 Hz +/- 1.0. The discrimination between the four motor imagery tasks based on classification of single EEG trials improved when, in addition to event-related desynchronization (ERD), event-related synchronization (ERS) patterns were induced in at least one or two tasks. This implies that such EEG phenomena may be utilized in a multi-class brain-computer interface (BCI) operated simply by motor imagery. (c) 2005 Elsevier Inc. All rights reserved.