Fig. 3.

Early prediction times during the scene search task. A: representative visual cell. Rows 1 and 2 show spike rasters and spike density curves for mean firing rates during the fixation period prior to saccades made into the response field (blue), and into the anti response field (red). Row 3 compares the firing rates between the 2 conditions and indicates the receiver operator characteristic (ROC) prediction time (green line). Black vertical lines indicate the beginning of the fixation period before the saccade (red dots in rasters). Activity occurring after the mean saccade latency shaded in gray. Row 4 displays the same cell's activity during the memory-guided saccade task. Activity is aligned by target onset (left) and saccade onset (right). Onset of visual response indicated by vertical green line. The cell fires strongly after target onset but not before the saccade. B: representative visuomovement cell. C: comparison between the mean visual response latency and the ROC prediction times for visual and visuomovement cell. Mean visual response latency was significantly greater than the ROC prediction times for either type of FEF cell.