 Ibotenic acid and muscimol are structurally related to each other and to two major <unk> of the central nervous system : <unk> acid and <unk> respectively . Ibotenic acid and muscimol act like these <unk> , muscimol being a potent <unk> agonist , while ibotenic acid is an agonist of NMDA <unk> receptors and certain <unk> <unk> receptors which are involved in the control of <unk> activity . It is these interactions which are thought to cause the psychoactive effects found in intoxication . Muscimol is the agent responsible for the majority of the <unk> . 
