Spectral entropy analysis of different alpha band rhythms in relation to hand motor imagery  

作　　者：裴晓梅 郑崇勋 李人厚 

机构地区：[1]Institute of Biomedical Engineering, School of Electronic and information Engineering, Xi'an Jiaotong University

出　　处：《Journal of Pharmaceutical Analysis》2008年第3期202-205,共4页药物分析学报（英文版）

基　　金：National Natural Science Foundation of China (No.30370395and30670534);Chinese Post-doctoral Science Foundation (No.20070410380)

摘　　要：The event-related desynchronization/synchronization(ERD/ERS) time courses of lower and upper alpha band rhythms during hand motor imagery are investigated respectively by Fourier Sectral Entropy (FSE) in this paper. By analyzing one group of BCI competition data, it was found that FSE within upper alpha band displays a pronounced increase and decrease over contralateral and ipsilateral brain areas respectively at the onset of hand motor imagery, which is corresponding to the antagonistic ERD/ERS patterns in previous studies. Different from the upper alpha activity pattern, FSE within lower alpha band displays a consistent increase over both two hemispheres hand representative areas. The preliminary results show that FSE could disclose the different behaviors of the upper and lower alpha band rhythms so that a new idea with the complexity measure is provided to characterize functional dissociation of lower and upper frequency alpha rhythms in relation to hand motor imagery.The event-related desynchronization/synchronization(ERD/ERS) time courses of lower and upper alpha band rhythms during hand motor imagery are investigated respectively by Fourier Sectral Entropy (FSE) in this paper. By analyzing one group of BCI competition data, it was found that FSE within upper alpha band displays a pronounced increase and decrease over contralateral and ipsilateral brain areas respectively at the onset of hand motor imagery, which is corresponding to the antagonistic ERD/ERS patterns in previous studies. Different from the upper alpha activity pattern, FSE within lower alpha band displays a consistent increase over both two hemispheres hand representative areas. The preliminary results show that FSE could disclose the different behaviors of the upper and lower alpha band rhythms so that a new idea with the complexity measure is provided to characterize functional dissociation of lower and upper frequency alpha rhythms in relation to hand motor imagery.

关 键 词：Fourier Spectral Entropy (FSE) event-related EEG dsychronization/sychronization (ERD/ERS) complexity measure hand motor imagery 

分 类 号：R318[医药卫生—生物医学工程]