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Searching for hidden information with Gabor Transform in generalized tonic-clonic seizures
R Quian Quiroga1, S Blanco, O A Rosso
1Institute of Physiology, Medical University of Lübeck, Germany. rodri@physio.mu-luebeck.de
Abstract:
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.