High-order Spectra Analysis of Electroencephalogram

• Main Authors: Bruce Tasi, 蔡明哲
• Other Authors: 詹曉龍
• Format: Others
• Language: zh-TW
• Published: 2004
• Online Access: http://ndltd.ncl.edu.tw/handle/61794701449534114133

碩士 === 長庚大學 === 電機工程研究所 === 92 === Brain waves record at scalp reflect activity of cerebral cortex. The status of brain activity would be observed through the characteristic of Brain wave. Time-domain analysis and frequency-domain analysis are the major methods to demonstrate the characteristic of EEG. The former describes the characteristic of waveshape，and the later show second-order statistics of signal. Since the phase coupling between EEG components，the third-order statistics of EEG can reveal. In this thesis，We use the spectrum analysis and bispectrum analysis of EEG to investigate the second-order statistics and the third-order statistics information and compare the feature between coma EEG and normal EEG. The results demonstrate there is more strong quadratic phase coupling in slow band of coma EEG.