Determination of EEG activity propagation: Pair-wise versus multichannel estimate

被引：262

作者：

Kus, R ^{[1
]}

Kaminski, M ^{[1
]}

Blinowska, KJ ^{[1
]}

机构：

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

来源：

IEEE TRANSACTIONS ON BIOMEDICAL ENGINEERING | 2004年 / 51卷 / 09期

关键词：

coherences; directed transfer function; EEG propagation; Granger causality; multivariate autoregressive model; partial directed coherence;

D O I：

10.1109/TBME.2004.827929

中图分类号：

R318 [生物医学工程];

学科分类号：

0831 ;

摘要：

Performance of different estimators describing propagation of electroencephalogram (EEG) activity, namely: Granger causality, directed transfer function (DTF), direct DTF (dDTF), short-time DTF (SDTF), bivariate coherence, and partial directed coherence are compared by means of simulations and on the examples of experimental signals. In particular, the differences between pair-wise and multichannel estimates are studied. The results show unequivocally that in most cases, the pair-wise estimates are incorrect and a complete set of signals involved in a given process has to be used to obtain the correct pattern of EEG flows. Different performance of multivariate estimators of propagation depending on their normalization is discussed. Advantages of multivariate antoregressive model are pointed out.

引用

页码：1501 / 1510

页数：10

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