Abstract
Focal epilepsy can be produced by a blood-brain barrier (BBB)-excluded systemic convulsant (penicillin, folic acid, etc.) in the presence of a focal BBB lesion. Bicuculline methiodide, a γ-aminobutyric acid blocking epileptogen, crosses the normal BBB of rats poorly and produces no consistent abnormality behaviorally or on EEG of 36 mg/kg. When the BBB is opened in 0.25 ml of cortex by 6,000 rad of α particles, by a pin trauma lesion, or by a heat lesion, the rats are normal clinically and on EEG. When these lesioned rats are challenged with bicuculline methiodide, 36 mg/kg, an intense, highly localized epileptiform discharge results that begins ~20 min after injection and lasts 30-90 min. The plausibility and experimental utility of the BBB-epileptogen model of epilepsy are enhanced by these observations.
Original language | English (US) |
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Pages (from-to) | 69-73 |
Number of pages | 5 |
Journal | Epilepsia |
Volume | 26 |
Issue number | 1 |
State | Published - 1985 |
ASJC Scopus subject areas
- Clinical Neurology
- Neuroscience(all)