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Subject = wavelet multiscaling;
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Seizure characterisation using frequency-dependent multivariate dynamics
(2009)
Conlon, Thomas; Ruskin, Heather J.; Crane, Martin
Seizure characterisation using frequency-dependent multivariate dynamics
(2009)
Conlon, Thomas; Ruskin, Heather J.; Crane, Martin
Abstract:
The characterisation of epileptic seizures assists in the design of targeted pharmaceutical seizure prevention techniques and pre-surgical evaluations. In this paper, we expand on recent use of multivariate techniques to study the crosscorrelation dynamics between electroencephalographic (EEG) channels. The Maximum Overlap Discrete Wavelet Transform (MODWT) is applied in order to separate the EEG channels into their underlying frequencies. The dynamics of the cross-correlation matrix between channels, at each frequency, are then analysed in terms of the eigenspectrum. By examination of the eigenspectrum, we show that it is possible to identify frequency dependent changes in the correlation structure between channels which may be indicative of seizure activity. The technique is applied to EEG epileptiform data and the results indicate that the correlation dynamics vary over time and frequency, with larger correlations between channels at high frequencies. Additionally, a redistributi...
http://doras.dcu.ie/14854/
Displaying Results 1 - 1 of 1 on page 1 of 1
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