Figure 3. Graphs showing the distribution of movement velocities for the first-degree relatives of patients with progressive supranuclear palsy (FDR) and normal control (NC) groups for each of the four movement patterns of the wrist task. During the task, an auditory "go" signal was used to cue the subject to produce either flexion (A and C) or extension (B and D) of the wrist from the start point to the target position. The target position was either unbounded (A and B), requiring that the subject stop the movement, or bounded (C and D) by a mechanical stop, beyond which the movement could not be continued. Black bars = FDR; white bars = NC.
