β rebound after different types of motor imagery in man

被引：224
作者：
Pfurtscheller, G
Neuper, C
Brunner, C
da Silva, FL
机构：
[1] Graz Univ Technol, Inst Human Comp Interfaces, A-8010 Graz, Austria
[2] Graz Univ Technol, Ludwig Boltzmann Inst Med Informat & Neuroinforma, A-8010 Graz, Austria
[3] Univ Amsterdam, Fac Biol, Inst Neurobiol, NL-1012 WX Amsterdam, Netherlands
来源：
NEUROSCIENCE LETTERS | 2005年 / 378卷 / 03期
关键词：
supplementary motor area (SMA); electroencephalogram (EEG); event-related synchronization (ERS); motor imagery; beta oscillations;
D O I：
10.1016/j.neulet.2004.12.034
中图分类号：
Q189 [神经科学];
学科分类号：
071006 ;
摘要：
We investigated the behavior of short-lasting beta bursts (beta rebound, beta ERS) induced after imagination of hand, foot or tongue movement. Nine able-bodied subjects were asked to imagine one type of movement following the presentation of a visual cue stimulus. EEG was recorded from 60 closely spaced electrodes placed over frontal, central and parietal areas. Spatiotemporal ERD/ERS patterns were evaluated in form of time-frequency maps. Seven out of nine subjects displayed a significant short-lasting beta power increase (beta rebound) after termination of imagery of movement of both feet in the frequency range of 23-29 Hz with a clear maximum at the vertex. In contrast, only two subjects displayed a clear beta rebound at the vertex after imagery of one of the hands, although five exhibited a significant beta rebound at the contralateral side of the head. None showed a beta rebound after tongue motor imagery. The midcentrally located beta rebound is interpreted as an electrophysiological correlate of a simultaneous "resetting" of overlapping neural networks in the foot representation areas and the SMA. (c) 2004 Elsevier Ireland Ltd. All rights reserved.
引用
收藏
页码：156 / 159
页数：4
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