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.
journal_name
Exp Neuroljournal_title
Experimental neurologyauthors
Marescaux C,Vergnes M,Kiesmann M,Depaulis A,Micheletti G,Warter JMdoi
10.1016/0014-4886(87)90290-1subject
Has Abstractpub_date
1987-07-01 00:00:00pages
160-8issue
1eissn
0014-4886issn
1090-2430pii
0014-4886(87)90290-1journal_volume
97pub_type
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