Fig. 2.

Reward circuits coopted to serve social functions. (A, Left) Firing rates aligned to social image onset for OFC neurons in a social choice task. (Right) Percentage of OFC neurons with activity significantly modulated by social image category (black bar), fluid amount (gray bar), or their interaction (white bar) for three monkeys (M1–M3). Reproduced from (38) with permission from Elsevier. (B, Left) Firing rates of example neurons from each area, aligned to reward delivery. Box color signifies the category to which these neurons belong in the bar graphs. (Right) Proportion of significant neurons from OFC, ACCs, and ACCg using self, other, and shared frames of reference to encode reward outcomes during a reward-allocation task. Horizontal lines indicate significant differences (P < 0.05, χ² test). Reproduced from ref. 36 with permission.