Figure 6.

Distribution of reward modulation in traditional FEF neuron categories. A, Percentage of neurons in the visual, visuomovement, movement, and fixation categories for all 75 FEF neurons. B, Percentage of reward-modulated neurons in the four categories. The numbers of neurons showing each of the three types of reward modulation are 21, 23, and 10, respectively. Visuomovement neurons in FEF dominate in every type of reward modulation. Note that “Reward-Cue” is an abbreviation for “reward modulation in one cue position.”