Only 20 % of the patients are correctly diagnosed and fewer are
appropriately treated. Subjective visual vertical (SVV) method of diagnosis and
normalization of the vestibular ablation has limited its diagnostic potential.
Visual background also affects SVV. With a rotating background, the dynamic
visual vertical (DVV) is normally shifted in the direction of
This invention would greatly assist in the correct diagnosis of migraine
associated vertigo (MAV) and for rehabilitation of patients with MAV and
peripheral vestibular disorders.