Abstract
Motor limbic seizures occur following a systemic injection of pilocarpine (380 mg/kg) in rats. Focal injection of the selective N-methyl- d-aspartate receptor antagonist, (±)-2-amino-7-phosphonoheptanoic acid (2-APH, 5–20 pmol), bilaterally into the entopeduncular nucleus (EP) prior to pilocarine blocks these seizures. Muscimol (50 pmol), a potent γ-aminobutyric acid receptor agonist, injected bilaterally into EP produces a similar protection against pilocarpine-induced seizures. Thus by blocking excitatory neurotransmission or facilitating inhibition within the EP, the severity of limbic seizures can be reduced.
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