Comparison of the effects of olanzapine on deficient sensory inhibition with the effects of clozapine and haloperidol (Simosky et al 2003). Shown is the average TC ratio for before and after administration of each antipsychotic. In DBA/2 mice, as in schizophrenia patients, only atypical antipsychotics are associated with improved inhibitory sensory processing. Data are mean ± SEM, *p<0.05, Student’s t-test, n=14 for haloperidol, n=8 for clozapine, n=8 for olanzapine.