Brain Stem Response and Cochlear Action Potential in Cases of Post-traumatic Disorders of Head and Neck Injury accompanied with Auditory Disturbance

Abstract

Relation of pure tone auditory threshold to BSR and AP threshold was studied in 72 cases of head and neck injury with auditory disturbance.A difinite corelation was found between pure tone hearing threshold and BSR threshold in most of patients of head and neck injury.Amplitude of BSR delivered from the side of the patient's head received craniotomy decreased in 4 cases of 7 cases.There were significant differences on the amplitude of BSR waves and the appearance of the Ist to V th waves between the right and left ear.Topographic recording of BSR was attempted in the cases of central nervous disorder. BSR was topographically delivered from 10-16 points on the scalp according to the international 10-20 electrodes system. On the topographic recording of the BSR, there was a clear difference on the ampulitude of IV-V waves of BSR between cases of central nervous disorder and normal hearing adults. Measurement of BSR and AP on the posttraumatic syndrome will provide a worthwhile information for the diagnosis of hearing disturbance and central nervous disorder.