Fig. 1.

(A) Task design. Rats were presented with RS or NS. NS responses (gray) produced no outcome. RS responses ended the RS tone, retracted the lever, and illuminated the reward well. Post-RS well entry resulted in sucrose reward (black). In extinction sessions, all events were the same except that well entry produced no reward (dashed line). (B) Lever press and well entry behavior for rats providing PL and IL neural recordings as indicated. RS lever presses and well entries decreased significantly across extinction days. For these and all following figures, error bars are mean ± SEM. Statistics are provided in Task Performance. (C) Placement of recording wire tips for PL-implanted (red) and IL-implanted (blue) animals. All wires tips were histologically localized to the respective prefrontal region.