Fig 5. Nonlinear regression fitted lines of logistic psychometric function on the normalized percent time data at different stimulation amplitudes for a typical subject.

(A) motion perception using Joystick data (red squares indicate normalized percent time of perceptual motion detected at each stimulation level), (B) body sway using physiological data: Fy, Mx, Hay, Hrv, Tay, Trv (individual normalized percent time data points quantified for each of the different body sway measures are not shown for clarity).