Abstract
he role of basolateral amygdaloid nuclei (BLN) in sleep and wakeful state (W)was investigated with polysomnography. Electrical lesion of bilatend BLN increased slow wave sleep (SWS) and paradoxical sleep (PS), but decreased W. Bilateral injection of kainic acid (KA), which selectively destroyed the soma of neurons, resulted in biphasic effects-At d 1 after KA, insmmia occurred. At d 4, SWS increased while W decreased,but PS did not change. Unilateral injection of NO donor sodium nitroferricyanide (SNP)caused an enhanement of W and a decrease of SWS. Injection of nitric oxide synthase inhibitor N-nitro-L-arginine (L-NNA