Figure 2.

Saccade adaptation exposure. Sequences of events (time running downward) in right hemi-field trials (left hemi-field trials not shown) are depicted for the reactive saccade adaptation task (A) and the voluntary saccade adaptation task (B). Vertical and rightward horizontal arrows correspond to the primary saccade toward the target. Leftward arrows correspond to the corrective saccade toward the shifted target and to the return saccade to the screen center. When the horizontal primary saccade is detected (eye velocity threshold 70–90°/s), the target (reactive saccade adaptation) or the entire visual display (voluntary saccade adaptation) jumps back toward the center by 4°. For the control tasks (not shown), the same sequence of events unfolds, except for the target jumps.