Effects of antiepileptic drugs on learning as assessed by a repeated acquisition of response sequences task in rats.

Effects of antiepileptic drugs on learning as assessed by a repeated acquisition of response sequences task in rats. Research Abstract Details 

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Effects of antiepileptic drugs on learning as assessed by a repeated acquisition of response sequences task in rats. Abstract Text:

Harlan E Shannon,Patrick L Love,

Patients with epilepsy can have impaired cognitive abilities. Antiepileptic drugs (AEDs) may contribute to the cognitive deficits observed in patients with epilepsy, and have been shown to induce cognitive impairments in healthy individuals. However, there are few systematic data on the effects of AEDs on specific cognitive domains. We have previously demonstrated that a number of AEDs can impair working memory and attention. The purpose of the present study was to evaluate the effects of AEDs on learning as measured by a repeated acquisition of response sequences task in nonepileptic rats. The GABA-related AEDs phenobarbital and chlordiazepoxide significantly disrupted performance by shifting the learning curve to the right and increasing errors, whereas tiagabine and valproate did not. The sodium channel blockers carbamazepine and phenytoin suppressed responding at higher doses, whereas lamotrigine shifted the learning curve to the right and increased errors, and topiramate was without significant effect. Levetiracetam also shifted the learning curve to the right and increased errors. The disruptions produced by triazolam, chlordiazepoxide, lamotrigine, and levetiracetam were qualitatively similar to the effects of the muscarinic cholinergic receptor antagonist scopolamine. The present results indicate that AEDs can impair learning, but there are differences among AEDs in the magnitude of the disruption in nonepileptic rats, with drugs that enhance GABA receptor function and some that block sodium channels producing the most consistent impairment of learning.

Effects of antiepileptic drugs on learning as assessed by a repeated acquisition of response sequences task in rats. Publishing Authors By Initials

HE Shannon,PL Love,

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Effects of antiepileptic drugs on learning as assessed by a repeated acquisition of response sequences task in rats. Journal Published:

PUBLICATION TYPE: Journal Article

Journal: Epilepsy & behavior : E&B

VOLUME: 10

Page Numbers: 16-25

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ISSN: 1525-5050

DAY: 14

MONTH: 12

YEAR: 2006

Effects of antiepileptic drugs on learning as assessed by a repeated acquisition of response sequences task in rats. Information

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LANGUAGE: eng

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Grant and Affiliation Information for Effects of antiepileptic drugs on learning as assessed by a repeated acquisition of response sequences task in rats.

AFFILIATION: Lilly Research Laboratories, Eli Lilly & Company, Lilly Corporate Center, Indianapolis, IN 46285, USA.

Country: United States

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MEDLINETA: Epilepsy Behav

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