Figure 2. a–d.

Raw data for a healthy participant (right) to 500-Hz Fz BCV. The top row (a and b) shows oVEMPs to bone-conducted vibration: the yellow rectangle shows the time of the n10 response, which is symmetrical beneath the eyes of the subject indicating symmetrical utricular macula function. The patient’s eyes show a normal oVEMP response. The down row (c and d) shows the cVEMPs to 500-Hz Fz BCV: the blue rectangle shows the time of the p13 (p1) and n23 (n1) responses, marked with small vertical lines. These responses are normal and symmetrical. The left side (for the viewer) of the figure shows results of vHIT testing of both left and right semicircular canals: eye velocity (red traces) and head velocity (black traces) versus time. The signs of head velocity for rightward impulses and of eye velocity for leftward impulses have been inverted for easier comparison. Healthy subjects show normal responses for head impulses to both sides—eye velocity matched head velocity closely.