Statistical probability mapping reveals high-frequency magnetoencephalographic activity in supplementary motor area during self-paced finger movements

被引：31

作者：

Kaiser, J

Lutzenberger, W

Preissl, H

Mosshammer, D

Birbaumer, N

机构：

[1] Univ Tubingen, MEG Ctr, Inst Med Psychol & Behav Neurobiol, D-72074 Tubingen, Germany

[2] Univ Padua, Dept Gen Psychol, Padua, Italy

来源：

NEUROSCIENCE LETTERS | 2000年 / 283卷 / 01期

关键词：

magnetoencephalography; oscillatory activity; statistical probability mapping; finger movements; self-paced; supplementary motor area; human subjects;

D O I：

10.1016/S0304-3940(00)00921-6

中图分类号：

Q189 [神经科学];

学科分类号：

071006 ;

摘要：

Investigations of both haemodynamic and electroencephalographic measures of brain activity have demonstrated supplementary motor area (SMA) involvement in self-paced finger movements. in contrast, analysis of magnetoencephalographic (MEG) signals in the time domain has usually failed to detect SMA activity in healthy individuals. We investigated oscillatory MEG activity in 12 normal adults during (a) a self-paced, complex sequence of finger movements and (b) a simple finger opposition task paced externally by tactile stimuli presented to the contralateral thumb. Statistical probability mapping revealed enhanced non-phase-locked spectral amplitudes in the 22-28 Hz range over bilateral frontal cortex during self-paced as compared to externally cued finger movements. This activity may reflect recruitment of cell assemblies in SMA during self-paced, complex movements. (C) 2000 Elsevier Science Ireland Ltd. All rights reserved.

引用

页码：81 / 84

页数：4

共 20 条

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