Example horizontal eye and head movement trajectories.

<p>Four examples of eye (blue), head (black), body (green), and gaze (red) rotational trajectories during the first two seconds of each trial. The plus and star indicate the onset and offset, respectively, of each gaze and head movement. A saccade is the distance between the plus and star. Upward deflection of the traces indicates rightward movement. The two vertical dashed lines across each trace represent head movement onset and offset. One saccade (A), two saccades (B), three saccades (C), and four saccades (D) in one head movement are shown.