Presentation 2000/11/23
An analysis of the dynamics of epileptic EEG
Daisuke SATO, Mitsuyuki NAKAO, Taisuke OTUKI, Norihiro KATAYAMA, Mitsuaki YAMAMOTO,
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Abstract(in English) We aimed to estimate epileptic foci and spreading processes of excitation. We assumed that the observed epileptic electroencephalogram(EEG)is a mixture of mutually uncorrelated signals, and analyzed it by applying a blind source separation(BBS). BBS was performed by the method using the covariance matrices with some time-lags. We showed spatial contribution of the separated sources by topogaph, and traced the time-evolution of source dynamics by connecting correlated sources in the adjacent data segments. As a result, it was found that the features of the time-evolution was shared by the epileptic activities studied. In addition, in the beginning of the epileptic activity there was a source showing the focus-related topograph. These findings provide important information to understand the nerual mechanism underlying epileptic activities.
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Keyword(in English) Epilepsy / Blind source separation / time-evolution / topograph
Paper # MBE2000-93
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Conference Information
Committee MBE
Conference Date 2000/11/23(1days)
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Paper Information
Registration To ME and Bio Cybernetics (MBE)
Language JPN
Title (in Japanese) (See Japanese page)
Sub Title (in Japanese) (See Japanese page)
Title (in English) An analysis of the dynamics of epileptic EEG
Sub Title (in English)
Keyword(1) Epilepsy
Keyword(2) Blind source separation
Keyword(3) time-evolution
Keyword(4) topograph
1st Author's Name Daisuke SATO
1st Author's Affiliation Graduate School of Information Sciences, Tohoku University()
2nd Author's Name Mitsuyuki NAKAO
2nd Author's Affiliation Graduate School of Information Sciences, Tohoku University
3rd Author's Name Taisuke OTUKI
3rd Author's Affiliation National Center Hospital for Metal, Nervous and Muscle Disorders, NCNP
4th Author's Name Norihiro KATAYAMA
4th Author's Affiliation Graduate School of Information Sciences, Tohoku University
5th Author's Name Mitsuaki YAMAMOTO
5th Author's Affiliation Graduate School of Information Sciences, Tohoku University
Date 2000/11/23
Paper # MBE2000-93
Volume (vol) vol.100
Number (no) 478
Page pp.pp.-
#Pages 7
Date of Issue