Generalization of seizures parallels the formation of "dark" neurons in the hippocampus and pontine reticular formation after focal-cortical application of 4-aminopyridine (4-AP) in the rat.

Abstract:

:Distribution and time course of the occurrence of "dark" neurons were compared with the EEG activity and behavior of rats during 4-aminopyridine (4-AP) induced epileptic seizures. A crystal of the K(+) channel blocker 4-AP (0.5 mg/kg) was placed onto the exposed parieto-occipital cortex of Halothane-anesthetized rats for 40 min. Thereafter, the anesthesia was discontinued and the behavioral signs of the epileptic seizure activity were observed. The presence of "dark" neurons was demonstrated by the sensitive silver method of Gallyas in rats sacrificed at 0, 3 and 6 h after the end of the 4-AP crystal application. The EEG activity was recorded in the rats with longer survival times. The EEG analysis revealed the generalization of the epileptic seizures. We found that the formation of "dark" neurons in the hippocampus and the pontine reticular formation paralleled the generalization of the seizures.

journal_name

Brain Res

journal_title

Brain research

authors

Baracskay P,Szepesi Z,Orbán G,Juhász G,Czurkó A

doi

10.1016/j.brainres.2008.06.044

subject

Has Abstract

pub_date

2008-09-04 00:00:00

pages

217-28

eissn

0006-8993

issn

1872-6240

pii

S0006-8993(08)01480-7

journal_volume

1228

pub_type

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