Figure 2.

Movement kinematics during the task. A, Example trajectories including intercept and track periods at each of the five speeds as indicated. Each trajectory is the average of 10 trials, with the target moving in a CCW direction with the start angle of 0°. B, The average speed profiles from the same trials shown in A. Initial peak in speed is during the intercept period, followed by the track period speed. C, The horizontal (x) and vertical (y) components of eye movements averaged over four to five trials. The initial component is the eye movement during the intercept period followed by the smooth pursuit.