Figure 3. Proportion of ACC neurons encoding effort or reward.

(A) Mean proportion of recorded neurons that discriminate barrier height in pre- or post-injection conditions. The proportion increases up to the barrier traverse. The shaded region surrounding the curves indicates SEM. Background colors correspond to each of the 36 spatial bins of the maze shown in the inset. (B) Mean proportion of recorded neurons responding to the reward. (C) Relative change in mean firing rate after injection (mean and SEM).