The effects of high-frequency oscillations in hippocampal electrical activities on the classification of epileptiform events using artificial neural networks

Journal of Neural Engineering
Alan W L ChiuBerj L Bardakjian

Abstract

The existence of hippocampal high-frequency electrical activities (greater than 100 Hz) during the progression of seizure episodes in both human and animal experimental models of epilepsy has been well documented (Bragin A, Engel J, Wilson C L, Fried I and Buzsáki G 1999 Hippocampus 9 137-42; Khosravani H, Pinnegar C R, Mitchell J R, Bardakjian B L, Federico P and Carlen P L 2005 Epilepsia 46 1-10). However, this information has not been studied between successive seizure episodes or utilized in the application of seizure classification. In this study, we examine the dynamical changes of an in vitro low Mg2+ rat hippocampal slice model of epilepsy at different frequency bands using wavelet transforms and artificial neural networks. By dividing the time-frequency spectrum of each seizure-like event (SLE) into frequency bins, we can analyze their burst-to-burst variations within individual SLEs as well as between successive SLE episodes. Wavelet energy and wavelet entropy are estimated for intracellular and extracellular electrical recordings using sufficiently high sampling rates (10 kHz). We demonstrate that the activities of high-frequency oscillations in the 100-400 Hz range increase as the slice approaches SLE onsets and in ...Continue Reading

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Citations

Feb 25, 2011·Annals of Biomedical Engineering·Demitre SerletisPeter L Carlen
Mar 19, 2013·Neural Networks : the Official Journal of the International Neural Network Society·Osbert C Zalay, Berj L Bardakjian
Jun 19, 2013·IEEE Transactions on Neural Systems and Rehabilitation Engineering : a Publication of the IEEE Engineering in Medicine and Biology Society·Mirna GuirgisBerj Bardakjian
Jun 4, 2013·Neural Networks : the Official Journal of the International Neural Network Society·Sinisa ColicBerj L Bardakjian
Nov 12, 2013·Computers in Biology and Medicine·Arturo SoteloYuliana Martínez
Apr 1, 2018·Journal of Psycholinguistic Research·Shenai HuAnna Gavarró
Oct 16, 2020·International Journal of Molecular Sciences·Mark S AquilinoPeter L Carlen

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