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Visualization of propagating process in the seizure discharge by use of cross-correlation analysis  

Kim Jin-Woo (경성대학교 멀티미디어통신공학과)
Publication Information
Journal of the Korea Institute of Information and Communication Engineering / v.10, no.8, 2006 , pp. 1471-1477 More about this Journal
Abstract
Electrocorticogram (ECoG) was recorded in one young adult suffering from medically refractory partial seizures a few weeks before resection. ECoG of intractable focal epilepsy was analyzed usins AR model, wavelet analysis and cross-correlation analysis. The cross-correlation of the epileptic discharges was calculated between the electrodes in every unit of time, to get the phase shift. A contour map of the phase shift and the sequential two-dimensional phase shift maps were utilized to localize the epileptic foci and to study their propagation process. More than two epileptogenic foci were localized and two kinds of propagating process were shown. These investigations suggest that epileptic phenomena can be caused by at least two kinds of mechanisms in one patient.
Keywords
ECoG; Epilepsy; Cross-correlation analysis; AR model; Visualization;
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