Article: PDF OnlyYoung Deborah; Dragunow, MichaelNeuroReport: July 1994 - p 1481-1484 Buy Abstract Muscarinic, NMDA and metabotropic glutamate receptor antagonists were tested for anticonvulsant effects in a continuous hippocampal stimulation model in rats in order to identify the receptors involved in the initiation of electrically induced status epilepticus (SE). Whereas the muscarinic receptor antagonists scopolamine and atro- pine and the metabotropic receptor antagonist L(+)-2− amino-3-phosphonopropionic acid (AP3) did not affect SE initiation, the N-methyl-D-aspartate (NMDA) antagonist dizocilpine (MK-801) (1 mg kg-1 i.p.) and the non-NMDA ionotropic receptor antagonist 2,3-dihydroxy-6-nitro-7− suIphamoyIbenzo(F)-quinoxaline (NBQX) (two doses of 50 μg i.c.v.) prevented the induction of SE. It has been shown in a previous study that non-NMDA ionotropic receptors are involved in SE maintenance and it is now suggested that activation of NMDA receptors may principally initiate electrically induced SE, although non- NMDA ionotropic receptors may also be involved. © Lippincott-Raven Publishers.