Figure 5.

Response- and reward-related activations do not encode effort or delay. (a) Differential activity plots for neurons activated prior to the response, after the initial response, prior to response completion/reward delivery, and following response completion/reward delivery in the effort-based task. Gray area in top panels illustrate the 2.5s epoch under consideration, relative to lever press responses on low cost and high cost trials (gold and blue tick marks, respectively). Lower panels represent differential activity for each neuron, as in Fig. 3c. Overall activity was not significantly cue-selective for any epoch (all p’s > 0.1). (b) Differential activity plots for neurons activated prior to the response, after the response, prior to reward delivery, and following reward delivery in the delay-based task. Conventions follow from panel a, except that tick marks in top panels represent lever press responses on immediate and delayed reward trials. Again, activity was not significantly cue-selective for any epoch (all p’s > 0.5).