Figure 3.

Histograms of single-unit activity of a floccular VA Purkinje cell recorded during vestibular stimulation (0.2 Hz, 6.3°/s) under three different visual conditions: in the light with a stationary visual surround (column 1), in the light with a visual surround that moved in phase with the turntable (VOR cancellation, column 2), and in the dark (column 3). A, Average angular velocity of the head (black line), the slow-phase eye movement (gray line), and the residual retinal image slip (light-gray dashed line). B, Average CS firing rate. C, Average simple spike firing rate. The average angular velocity of the optokinetic drum is indicated with the red dashed line in A₂.