Steady-state movement-related cortical potentials: A new approach to assessing cortical activity associated with fast repetitive finger movements
Steady-state movement-related cortical potentials: A new approach to assessing cortical activity associated with fast repetitive finger movements
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DOI：
10.1016/s0921-884x(96)96039-7
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发表时间：
1997-02-01
期刊：
影响因子：
--
通讯作者：
Hallett, M
中科院分区：
文献类型：
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作者：
Gerloff, C;Toro, C;Hallett, M
传统上，运动相关皮层电位的研究主要集中在缓慢进行的单一自定节奏运动的准备上。我们用28通道（10名正常受试者）和122通道（2名受试者）的脑电图研究了节拍器节奏、快速重复手指运动（2/s）引发的核磁共振cps。肌电锁定平均500 ms时间窗（每次肌电发作前300 ms至200 ms）产生明显的相相mrcp模式（稳态mrcp）。主要成分为肌电开始前57 ms的运动前峰（pre-MP）和肌电开始后93 ms的运动后峰（post-MP）。从时序信息和地形映射结果来看，我们认为前mf主要是由中央沟前岸的切向源产生的，反映了中央前运动加工，而后mp则是在中央沟后岸产生的，代表了中央后反馈加工。稳态MRCPs要求实际记录时间小于10分钟，并表现出优异的间歇再现性。这些特点为实验和临床研究感觉运动皮层活动提供了方便。(C) 1997爱思唯尔科学爱尔兰有限公司
Traditionally, studies of movement-related cortical potentials have focused on the preparation of single self-paced movements performed slowly. We studied MRCPs elicited by metronome-paced, fast repetitive finger movements (2/s) with 28-channel(10 normal subjects) and 122-channel (two subjects) EEG. EMG-locked averaging of 500 ms time windows (300 ms before to 200 ms after each EMG onset) produced a distinct pattern of phasic MRCPs (steady-state MRCPs). The main components were a pre-movement peak (pre-MP), 57 ms before EMG onset, and a post-movement peak (post-MP), 93 ms after EMG onset. From timing information and topographic mapping results, we propose that the pre-MF is largely generated by a tangential source in the anterior bank of the central sulcus and reflects precentral motor processing, whereas the post-MP is generated in the posterior bank of the central sulcus and represents post-central feedback processing. Steady-state MRCPs require actual recording times of less than 10 min, and show excellent intersession reproducibility. These characteristics may make them convenient for studying sensorimotor cortex activity experimentally and clinically. (C) 1997 Elsevier Science Ireland Ltd.