Fig. 1.

During the line bisection task, participants adopted very different behaviors as illustrated by the hand trajectories from 2 typical subjects. Participant 19 (A) exhibited curved movements for the far targets, while participant 12 (B) reached straight to the center of the line for both near and far targets. For each subject, the starting position is represented by the square and the target lines are represented as black bars. For clarity, the lines are shorter in the illustration than in reality (10, 15, or 20 cm). Hand trajectories of all the trials for these participants are given for horizontal lines (blue traces) and for vertical lines (red traces). The distances between the different targets and the starting position are given in A. For each subject, the inset in the center of the panel represents the average vectorial velocity trace (aligned on time of reaching to the target) for horizontal near and far targets (dashed and solid lines, respectively). Body midline was aligned with 0 on the horizontal axis.