Figure 6.

Pooled average activity from FEF neurons recorded during the lever search tasks aligned on the time of the search array presentation (a) and the time of the initiation of the lever turn (b). The activity of target-selective visually responsive neurons and movement neurons is shown separately. Thick lines plot the average activity on trials in which the target landed in the response field. Thin lines plot the average activity on trials in which only distractors landed in the response field. The spatial extent of the response field was based on activity recorded during the memory-guided saccade task (see Figs. 3a,d, 4a). For the movement neurons, the target-related and distractor-related activity was nearly identical and cannot be differentiated in the plots. The box-whisker plots show the median, quartile, and ranges of the lever turn reaction times (a) and search array presentation times (b) separately for the location and identity search tasks.