Interneuron activity leads to initiation of low-voltage fast-onset seizures.

Abstract:

:Seizures in temporal lobe epilepsy can be classified as hypersynchronous and low-voltage fast according to their onset patterns. Experimental evidence suggests that low-voltage fast-onset seizures mainly result from the synchronous activity of γ-aminobutyric acid-releasing cells. In this study, we tested this hypothesis using the optogenetic control of parvalbumin-positive interneurons in the entorhinal cortex, in the in vitro 4-aminopyridine model. We found that both spontaneous and optogenetically induced seizures had similar low-voltage fast-onset patterns. In addition, both types of seizures presented with higher ripple than fast ripple rates. Our data demonstrate the involvement of interneuronal networks in the initiation of low-voltage fast-onset seizures.

journal_name

Ann Neurol

journal_title

Annals of neurology

authors

Shiri Z,Manseau F,Lévesque M,Williams S,Avoli M

doi

10.1002/ana.24342

subject

Has Abstract

pub_date

2015-03-01 00:00:00

pages

541-6

issue

3

eissn

0364-5134

issn

1531-8249

journal_volume

77

pub_type

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