PMID: 7089032May 1, 1982Paper

Opiate modification of amygdaloid-kindled seizures in rats

Pharmacology, Biochemistry, and Behavior
W S StoneR F Berman

Abstract

Male Long-Evans rats were stereotaxically implanted bilaterally with bipolar electrodes in the central amygdala. Rats were then kindled once daily for 1 sec until 3 consecutive Stage V [25] kindled seizures were elicited. On the following day, animals were injected (IP) with either saline, naloxone (10 mg/kg), naltrexone (10mg/kg) or morphine sulfate (10 mg/kg) and again stimulated at the kindling stimulation parameters. Saline injected animals continued to show long bilateral AD's and behaviors (i.e., forelimb clonus, rearing, falling) typical of Stage V kindled animals. In contrast, rats injected with naloxone or naltrexone showed reduced behavioral seizures. Potentiation of post-ictal spiking by morphine in amygdaloid-kindled rats was also observed supporting previous reports [7,21]. In a second experiment, the reduction of kindled seizure serverity by naloxone was systematically replicated. It is concluded that opiates can significantly modify amygdaloid-kindled seizures, and that brain endorphins may play a role in the development or maintenance of an amygdaloid-kindled seizure focus.

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Related Concepts

Amygdaloid Structure
Electroencephalogram
Kindling, Neurologic
Morphine Sulfate (2: 1), Pentahydrate
Naloxone, (5 beta,9 alpha,13 alpha,14 alpha)-Isomer
Trexan
Narcotic Effect
August Rats

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