Status epilepticus facilitated by pilocarpine in amygdala-kindled rats.

Abstract:

:A novel model of status epilepticus based on the kindling model of epilepsy is described. The model involves the administration of a small dose of pilocarpine (20 mg/kg) to rats that have been previously kindled. Stimulation of these pretreated rats produces seizures which continue uninterrupted for approximately 4 h before spontaneous termination. The electroencephalographic discharge pattern showed characteristic changes in polarity and amplitude throughout the duration of status epilepticus. Behaviorally, the animals showed motor seizures which varied between stages I through IV, with evidence of extensive bilateral hemispheric involvement through much of the seizure episode. Animals that had been partially kindled to stage II seizures did not develop status epilepticus after stimulation when pretreated with pilocarpine, indicating that prior kindling is integral to the development of status epilepticus in this model. Administration of scopolamine was ineffective in terminating the condition when it had begun, suggesting that cholinergic stimulation is necessary for the initiation, but not the maintenance, of status epilepticus. This model holds promise for the study of status epilepticus because the condition develops in a seizure-prone (kindled) rat, and the seizures are self-sustaining, without the presence of exogenous chemicals or neurotoxins.

journal_name

Exp Neurol

journal_title

Experimental neurology

authors

Buterbaugh GG,Michelson HB,Keyser DO

doi

10.1016/0014-4886(86)90274-8

subject

Has Abstract

pub_date

1986-10-01 00:00:00

pages

91-102

issue

1

eissn

0014-4886

issn

1090-2430

pii

0014-4886(86)90274-8

journal_volume

94

pub_type

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