High-order Spectra Analysis of Electroencephalogram
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 t...
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| Format: | Others |
| Language: | zh-TW |
| Published: |
2004
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| Online Access: | http://ndltd.ncl.edu.tw/handle/61794701449534114133 |
| Summary: | 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.
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