Searching for hidden information with Gabor Transform in generalized tonic-clonic seizures.
The analysis of generalized tonic clonic seizures is usually difficult with scalp EEG due to muscle artifact. We applied Gabor Transform to evaluate 20 seizures from 8 consecutive patients admitted for video-EEG monitoring. We studied the relative intensity ratios of alpha, theta and delta bands over time. In 14/20 events we found a significant decremental activity in the delta band at the onset of the seizure indicating that this is dominated by theta and alpha bands. We conclude that GT is a useful auxiliary tool in the analysis of ictal activity that sheds light on the underlying pathophysiological mechanisms.
Quian Quiroga
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R
Institute of Physiology, Medical University of Lübeck, Germany. rodri@physio.mu-luebeck.de
Blanco
S
S
Rosso
O A
OA
Garcia
H
H
Rabinowicz
A
A
D000328:Adult; D000513:Alpha Rhythm; D002648:Child; D003700:Delta Rhythm; D004569:Electroencephalography; D004830:Epilepsy, Tonic-Clonic / Q000503:physiopathology*; D005260:Female; D005583:Fourier Analysis; D006801:Humans; D008297:Male; D008875:Middle Aged; D013826:Theta Rhythm; D013997:Time Factors