Propagation of EEG activity in the beta and gamma band during movement imagery in humans

被引：39

作者：

Ginter, J

Blinowska, KJ ^{[1
]}

Kaminski, M

Durka, PJ

Pfurtscheller, G

Neuper, C

机构：

[1] Univ Warsaw, Lab Med Phys, PL-00325 Warsaw, Poland

[2] Tech Univ, Inst Biomed Engn, Dept Med Informat, Graz, Austria

[3] Graz Univ Technol, Inst Biomed Engn, A-8010 Graz, Austria

来源：

METHODS OF INFORMATION IN MEDICINE | 2005年 / 44卷 / 01期

关键词：

short-time Directed Transfer Function (SDTF); motor imagery; beta rhythm; gamma rhythm; EEG activity propagation;

D O I：

10.1055/s-0038-1633932

中图分类号：

TP [自动化技术、计算机技术];

学科分类号：

0812 ;

摘要：

Objective: The objective of the paper was the determination of electrical brain activity propagation in sensorimotor areas during hand movement imagery. Methods: Right-hand and left-hand movement imagination was studied in three subjects. The 10-channel Multivariate Autoregressive Model (MVAR) was fitted to EEG signals recorded from subsets of electrodes overlying central and related brain areas. By means of the Short-time Directed Transfer Function (SDTF) the propagation of brain activity as a function of frequency and time was found. Results: During imagery the relation between propagations in gamma and beta bands changed significantly for electrodes overlying sensorimotor areas, namely the increase in gamma was accompanied by the decrease in the beta hand. Conclusions: The hypothesis was put forward that these kinds of changes in flow of electrical brain activity are connected with the specific information processing.

引用

页码：106 / 113

页数：8