Single neuron and population responses under the 8 main conditions. The left column shows responses under conditions in which a stimulus was present in both the current response field (CRF) and the future response field (FRF), and the right column shows responses under conditions in which a stimulus was present in only the CRF or FRF, but not both. Beneath each column is an illustration of the individual conditions which includes a legend to the colors. The dashed circles represent the CRF, the arrows the direction of the saccade, and the solid circles the FRF. In the abbreviated color-coded text: T—target, D—distractor, O—nothing in the receptive field. (A,B) The responses of a single neuron that does not have a postsaccadic burst of activity. (C,D) The responses of a single neuron that has a postsaccadic burst of activity. The histograms at the bottom of Panels A–D show the distribution of saccadic start times color-coded by condition. (E,F) The responses of the population of 52 neurons. The histograms at the bottom of the panels show the distribution of saccadic start times across all analyzed saccades in all sessions. Vertical dashed lines indicate the end of the saccade.