Fig. 1. Task procedures and histology.

A Probabilistic reversal learning task. At the start of a session, rats select one of two levers randomly designated as “correct” or “incorrect”. Each correct/incorrect choice is rewarded 80/20% of the time, respectively (left). After eight consecutive correct choices, the reward contingencies are reversed (middle) and this occurs again after another 8 consecutive correction choices for 200 trials (right). B Cost/benefit contingencies associated with responding on either lever on the probabilistic discounting task. Right, format of the sequence of forced and free-choice trials within each probability block for the discounting task in which the odds of obtaining the larger reward decreased from 100 to 6.25% across five blocks of trials. Schematic of coronal sections of the rat brain showing location of acceptable infusions in the mOFC for rats in the C probabilistic reversal learning, D probabilistic discounting, and E reward magnitude discrimination experiments.