Fig. 2.
Mean (±SEM) trials to criterion on acquisition and reversal learning of a two-choice odor discrimination. Each rat received a bilateral infusion of saline (SAL) or muscimol 0.5 μg (MUS) into the orbitofrontal cortex 5 min prior to each test session. Muscimol treatment did not impair acquisition, but significantly increased the trials to criterion in reversal learning compared with saline treatment. The treatment received on this test is shown in bold for each group. *p < .01 versus saline-injected controls.