[Electroencephalographic analysis of manifestations of latent forms of paroxysmal syndrome in the wakefulness-sleep cycle in rats].
An electroencephalographic study of the brain activity in the wakefulness-sleep cycle was carried out on rats of Krushinskii-Molodkina line (KM) with hereditary predisposition to audiogenic convulsions and on Wistar rats that were insensitive to the convulsiogenic sound effect, but with epileptiform manifestations appearing on the background of cadmium intoxication and administration of kainic acid into the caudate nucleus head. There were revealed several EEG patterns whose presence was an indicator of formation of disorders of the CNS activity of the paroxysmal character in the animals. It has been established that in the phase of the rat rapid-wave sleep, a high representation of episodes with predominance of a-diapason EEG oscillations can be considered a specific non-paroxysmal abnormality due to the presence of convulsive syndrome in these animals. It was shown the long steady decrease of sensitivity of KM rats to the convulsiogenic sound effect, which appeared after multiple audiogenic generalized tonicoclonic convulsive attacks, correlated with a decrease of the degree of theta-diapason oscillations and with an increase of representation of alpha-diapason waves on EEG in the state of the animal quiet consciousness. A role of disintegration in activity of the ascending activating brain systems in the animal and human paroxysmal syndromes is discussed.
Vataev
S I
SI
Oganesian
G A
GA
D000818:Animals; D002104:Cadmium / Q000633:toxicity; D004569:Electroencephalography; D004827:Epilepsy / Q000139:chemically induced / Q000503:physiopathology*; D018690:Excitatory Amino Acid Agonists / Q000633:toxicity; D007608:Kainic Acid / Q000633:toxicity; D008297:Male; D051381:Rats; D017208:Rats, Wistar; D012894:Sleep Stages; D013577:Syndrome; D014851:Wakefulness
D018690:Excitatory Amino Acid Agonists; D002104:Cadmium; D007608:Kainic Acid