Figure 4.

Grand peri-reward average of spike rate across all successful trials on all days, from onset of task performance to end of testing session. Rewarding brain stimulation occurs at t=0. Data have been normalized to the interval between baseline (0) and target (1). The mean trajectory is a smooth rise toward the center of the target, with a similarly rapid decline towards zero once target has been achieved. We do not observe persistently elevated activity post-reward, suggesting that MFB stimulation does not directly influence PFC firing.