Abstract
The auditory brainstem response (ABR) was examined in patients with intracranial diseases. As a diagnostic index, the ABR considered to give far more valuable and objective information on cerebellopontine-angle lesions (acoustic neuroma, cerebellopontine-angle meningioma, pons dysfunction) than for other central nerve disturbances. In most of the former cases, ABR patterns were characterized by disappearance or distortions of waves, so the diagnostic values of latencies (e. g. the prolongation of wave V) cannot be so clear as we supposed. The noteworthy fact is that metamorphosis of the wave V on contralateral stimulation which is an important phenomenon shows brainstem dysfunctions objectively. The above fact suggests the predominance of cross fibers in the acoustic nerve within the brainstem.
