[The value of auditory evoked brain stem potentials in the diagnosis of circulatory disorders in the area of vertebrobasilar circulation].

The acoustically-evoked brain-stem potential in patients with vertebrobasilar insufficiency has enjoyed a varied diagnostic evaluation in the literature. Our own examinations reveal an advantage in subdividing AEBP changes into normal and marginal, slight and pronounced, within a group of patients with blood supply disorders in the vertebrobasilar region. AEBP permits inferences to be made on the extent of the damage. However, one should be chary of referring AEBP change of vascular origin to any particular section on the basis of these deductions alone. Only the comprehensive consideration of clinical symptoms, AEBP findings, and neuroradiological examination leads to a valid opinion on extent and location.