Effects of olanzapine, sertindole and clozapine on learning and memory in the Morris water maze test in naive and MK-801-treated mice

► MK-801 induced marked cognitive deficits in mice. ► Olanzapine had some disturbing effects on cognition in naive animals. ► Olanzapine, sertindole and clozapine had beneficial effects in MK-801-treated mice.