Cocaine produces cholinergically mediated analeptic and EEG arousal effects in rabbits and rats.
Cocaine (1-5 mg/kg, IV) shortened the duration of loss of righting reflex produced in pentobarbital-narcotized rabbits. This effect was completely blocked by scopolamine (1 mg/kg, IV), but not by scopolamine methylbromide, suggesting that a central cholinergic mechanism was involved. In urethane-anesthetized rats cocaine (1 mg/kg, IV) consistently generated hippocampal EEG theta rhythm lasting about 40 min. This effect was also abolished by scopolamine. These results suggest that cocaine produced behavioral and EEG arousal responses that involved the septohippocampal cholinergic system.
Yabase
M
M
Department of Pharmacology, University of Washington School of Medicine, Seattle 98195.
Carino
M A
MA
Horita
A
A
D000109:Acetylcholine / Q000502:physiology*; D000818:Animals; D001143:Arousal / Q000187:drug effects*; D000697:Central Nervous System Stimulants; D003042:Cocaine / Q000037:antagonists & inhibitors / Q000494:pharmacology*; D004569:Electroencephalography / Q000187:drug effects*; D006624:Hippocampus / Q000187:drug effects; D008297:Male; D011817:Rabbits; D051381:Rats; D011919:Rats, Inbred Strains; D012601:Scopolamine / Q000494:pharmacology
D000697:Central Nervous System Stimulants; D012601:Scopolamine; D003042:Cocaine; D000109:Acetylcholine