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Kindling of audiogenic seizures in Wistar rats: an EEG study.
Exp Neurol ; 97(1): 160-8, 1987 Jul.
Article en En | MEDLINE | ID: mdl-3582560
ABSTRACT
The EEG of 20 Wistar rats inbred for audiogenic seizures was recorded during 40 daily auditory stimuli 90 s long. The first stimuli provoked wild running, with no cortical EEG abnormality, and then a tonic phase with a characteristic EEG of a brief flat trace 2 to 3 s long followed by low-amplitude regular activity, 10 to 12 c/s, lasting 40 to 60 s. The lack of paroxysmal EEG patterns suggests that the cortex plays only a minor role in audiogenic seizure development. After 5 to 15 daily stimuli, the EEG during the running period exhibited brief spike and spike-wave discharges preceding the EEG pattern of the tonic phase. After a few more daily stimuli these paroxysmal discharges progressively increased in amplitude and duration, overlapping with the regular activity of the tonic phase. After 20 to 30 stimuli, only high-amplitude spikes and spike-waves, 1 to 10 c/s, were seen for 40 to 120 s. The modified EEG persisted 2 to 4 months after daily stimulation was discontinued. Thus, with stimulus repetition, a paroxysmal discharge progressively involved cortical structures. These data suggest that repetition of audiogenic seizures induced a phenomenon related to kindling in Wistar rats susceptible to sound-induced epilepsy.
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Colección: 01-internacional Base de datos: MEDLINE Asunto principal: Encéfalo / Electroencefalografía / Excitación Neurológica Límite: Animals Idioma: En Revista: Exp Neurol Año: 1987 Tipo del documento: Article
Buscar en Google
Colección: 01-internacional Base de datos: MEDLINE Asunto principal: Encéfalo / Electroencefalografía / Excitación Neurológica Límite: Animals Idioma: En Revista: Exp Neurol Año: 1987 Tipo del documento: Article