Figure 1.

Schematic diagram of the saccade experiment. Monkeys made saccades (blue arrows) to visual targets (red dots) over a sparse white-noise background stimulus, composed of black and white dots against a light gray background. A, B, V4 receptive fields (blue ovals) were positioned in both monkeys in the lower left part of the visual field, thus separating the saccades into two groups, saccades toward (A) and away (B) from the RFs. C, Sketch of the temporal properties of the saccade experiment, with the lines representing the relative timing of the fixation point (FP), the saccade target (ST), and a typical eye movement (Eye). After a random duration period of fixation, the fixation point disappeared and simultaneously the saccade target appeared and remained on for the rest of the trial. The latency of the saccade from saccade target appearance was typically 150–200 ms.