The EEGs of 30 patients with central vertigo were examined by caloric vestibular stimulation (CVS). The control group consisted of 30 persons without vertigo disturbances. In the standard procedure (and after hyperventilation), there was no statistically significant difference between the two groups of patients. In comparison to the EEGs of healthy persons, CVS produced statistically significant differences ( P<0.001) in the EEGs of patients with vertigo.