Disinhibition-induced transitions between absence and tonic-clonic epileptic seizures

Denggui Fan (Author), Qingyun Wang (Author), Matjaž Perc (Author)

Abstract

Electrophysiological experiments have long revealed the existence of two-way transitions between absence and tonic-clonic epileptic seizures in the cerebral cortex. Based on a modified spatially-extended Taylor & Baier neural field model, we here propose a computational framework to mathematically describe the transition dynamics between these epileptic seizures. We first demonstrate the existence of various transition types that are induced by disinhibitory functions between two inhibitory variables in an isolated Taylor & Baier model. Moreover, we show that these disinhibition-induced transitions can lead to stable tonic-clonic oscillations as well as periodic spike with slow-wave discharges, which are the hallmark of absence seizures. We also observe fascinating dynamical states, such as periodic 2-spike with slow-wave discharges, tonic death, bursting oscillations, as well as saturated firing. Most importantly, we identify paths that represent physiologically plausible transitions between absence and tonic-clonic seizures in the modified spatially-extended Taylor & Baier model.

Keywords

epilepsija;nevronska dinamika;sinhronizacija;biofizika;epilepsy;neuronal dynamics;synchronization;biophysics;

Data

Language:	English
Year of publishing:	2015
Typology:	1.01 - Original Scientific Article
Organization:	UM FNM - Faculty of Natural Sciences and Mathematics
UDC:	53
COBISS:	21556488
ISSN:	2045-2322
Views:	673
Downloads:	318
Average score:	0 (0 votes)
Metadata:

Other data

Secondary language:	Slovenian
Secondary keywords:	epilepsija;nevronska dinamika;sinhronizacija;biofizika;
URN:	URN:SI:UM:
Type (COBISS):	Scientific work
Pages:	str. 1-12
Volume:	ǂVol. ǂ5
Issue:	ǂart. no. ǂ12618
Chronology:	2015
DOI:	10.1038/srep12618
ID:	9142750