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 Evaluation of different forms epileptic seizure time-frequency structure


Yu. V. Obukhov 1, G. D. Kuznetsova 2, A. V. Gabova 2, A. B. Shatskova 2, V. V. Gnezditskiy 3

1 Kotel′nikov Institute of Radio-engineering and Electronics of RAS

2 Institute of Higher Nervous Activity and Neurophysiology of RAS

3 Scientific Centre of Neurology of RAS


The paper is received on November 19, 2014


Abstract. The version of modified wavelet transform was developed for the time-frequency analysis of epileptic brain discharges. The analysis of different types of discharges in patients and animal models of genetic and experimental epilepsy was performed. Not less than three types of absence status different in time-frequency dynamics of seizure activity were revealed. The assumption about the existence of a few mechanisms supported longer paroxysmal rhythmical activity for these epilepsy types was made. In rats some types of nonconvulsive  epilepsy similar to different types of human epilepsy (typical spike-wave discharges of absence epilepsy,  occipital nonconvulsive discharges and nonconvulsive de novo discharges for elderly people). The results of time-frequency discharges structure analysis by modified wavelet transform can be useful for the differential diagnostics of different types of epilepsy.

Key words: Wavelet transform, time-frequency structure, epileptic brain activity in human and animals.