Phase and amplitude analysis in time-frequency space - application to voluntary finger movement

被引：61

作者：

Ginter, J ^{[1
]}

Blinowska, KJ ^{[1
]}

Kaminski, M ^{[1
]}

Durka, PJ ^{[1
]}

机构：

[1] Univ Warsaw, Inst Expt Phys, Lab Med Phys, PL-00681 Warsaw, Poland

来源：

JOURNAL OF NEUROSCIENCE METHODS | 2001年 / 110卷 / 1-2期

关键词：

time-frequency EEG analysis; event related synchronization; event related desynchronization; matching pursuit; multichannel autoregressive model; vector autoregressive model; short-time directed transfer function;

D O I：

10.1016/S0165-0270(01)00424-1

中图分类号：

Q5 [生物化学];

学科分类号：

071010 ; 081704 ;

摘要：

Two methods operating in time-frequency space were applied to analysis of EEG activity accompanying voluntary finger movements. The first one, based on matching pursuit approach provided high-resolution distributions of power in time-frequency space. The phenomena of event related desynchronization (ERD) and synchronization (ERS) were investigated without the need of band-pass filtering. Time evolution of mu- and beta -components was observed in a detailed way. The second method was based on a multichannel autoregressive model (MVAR) adapted for investigation of short-time changes in EEG signal. The direction and spectral content of the EEG activity propagation was estimated by means of short-time directed transfer function (SDTF). The evidence of 'cross-talk' between different areas of motor and sensory cortex was found. The earlier known phenomena, connected with voluntary movements, were confirmed and a new evidence concerning focal ERD/surround ERS and beta activity post-movement synchronization was found. (C) 2001 Elsevier Science B.V. All rights reserved.

引用

页码：113 / 124

页数：12

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