Disruption in prepulse inhibition after alpha-1 adrenoceptor stimulation in rats

The role of the alpha-1 adrenoceptor in prepulse inhibition (PPI) was evaluated in rats. The alpha-1 adrenergic agonist cirazoline disrupted PPI; this effect was reversed by the alpha-1 adrenergic antagonist prazosin or the atypical antipsychotic quetiapine. Alpha-1 adrenoceptors may thus be involved in the regulation of PPI and in the psychotherapeutic actions of certain antipsychotics.