Table 1.

Diagnostic criteria for bilateral vestibulopathy according to the classification Committee of the Bárány Society (13).

A. Chronic vestibular syndrome with the following symptoms    1. Unsteadiness when walking or standing1 plus at least one of 2 or 3    2. Movement-induced blurred vision or oscillopsia during walking or quick head/body movements and/or    3. Worsening of unsteadiness in darkness and/or on uneven ground

B. No symptoms while sitting or lying down under static conditions

C. Bilaterally reduced or absent angular VOR function documented by    1. Bilaterally pathological horizontal angular VOR gain < 0.6, measured by the video-HIT or scleral-coil technique and/or    2. Reduced caloric response (sum of bithermal max. peak SPV on each side < 6°/s) and/or    3. Reduced horizontal angular VOR gain < 0.1 upon sinusoidal stimulation on a rotatory chair (0.1 Hz, Vmax = 50°/s) and a phase lead >68 degrees (time constant < 5 s).

D. Not better accounted for by another disease