Figure 1.

Center-out task. The monkey controlled the movement of the cursor (white “+”) from the center to the peripheral target in the follow task sequence: A, The center target turned green. B, The monkey positioned the cursor in the center target. C, The monkey maintained the cursor in the center target for an initial center hold epoch. D, The center target turned gray as a Go Cue, and simultaneously one of the eight peripheral targets turned green, instructing a cursor movement to that target. E, The monkey moved the cursor into the instructed (green) target. F, Except for the instructed, green target, the display then turned black and the monkey thereafter maintained the cursor in the green target for a final hold epoch, the end of which completed a successful trial.