Fig. 2

Temporal Evolution of Movement Probability Distributions During 10 min of Free-Exploration. (A) Cumulative probability distributions over time intervals (0-0.5 min, 0–1 min, etc.) illustrating position (top), velocity (middle), and acceleration (bottom) along the anteroposterior (AP) and mediolateral (ML) axes. Two representative subjects from the W/O VF and VF group are depicted by blue and green boarders, respectively. (B) Time to characterization, point at which the CoD reached 0.9, in the W/O VF group (left) and the VF group (right) for all subjects using successive epochs are presented. Blue and green curves correspond to the representative subjects in (A), while the gray-scale curves represent all other subjects. Dashed lines indicate each of the 50 randomizations steps for each subject, whereas the solid lines denote the average of the 50 curves. The horizontal dashed line represents the 0.9 threshold. In the acceleration domain, one subject in the VF group did not reach the threshold for determination. Inserts in each plot display curves for random-order epochs. These results suggest that 5 min of data are sufficient to describe movement distributions across all kinematic domains