Abstract
Rats were trained to performed an aversely motivated discriminative task in a shuttle-box. The administration of phencyclidine (PCP), 2 mg kg−1 SC at −20 min, produced disruption of discriminative performance and an increase in intertrial crosses. There were no changes in avoidance performance or in avoidance latency. Pretreatment with haloperidol, 0.1 or 0.2 mg kg−1 SC at −40 min, or remoxipride 8 mg kg−1 IP at −30 min, did not antagonize the PCP-induced disruption of discriminative performance, nor was the PCP-induced increase in number of intertrial crosses antagonized. In fact, there appeared to be a further increase in intertrial crosses, above PCP levels, by haloperidol treatment and this effect was statistically significant after remoxipride treatment. The present results, together with previous observations that alsod-amphetamine disrupts discriminative conditioned avoidance behavior, suggest the possibility that this model could be used in the search for new, non-dopaminergic, antipsychotic drugs.
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Ericson, E., Ahlenius, S. Phencyclidine-induced disruption of an aversely motivated two-choice successive discrimination in the rat. Psychopharmacology 102, 171–174 (1990). https://doi.org/10.1007/BF02245918
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DOI: https://doi.org/10.1007/BF02245918