Fig. 1.

Roll tilt velocity and displacement motion profiles with final tilt equal to mean quasistatic tilt threshold. Eq. 1 relates final displacement and peak velocity of single-cycle sinusoid acceleration motion. Note that the peak velocity for quasistatic motion is very small compared with dynamic roll tilt velocity. The horizontal dashed gray lines are identical to the dashed cyan line in Fig. 4B. Subjects were encouraged to press a button after motion (shaded area); end of motion is indicated by the vertical dashed line. Insets expand the time scale to show motion profiles.