auditory brainstem response audiometry

auditory brainstem response audiometry

A neurologic test of brainstem function in response to 70–90 dB auditory (click) stimuli transmitted by an acoustic transducer to headphones. The evoked waveform response is measured by surface electrodes placed at the vertex of the scalp and ear lobes. The signal amplitude is averaged and charted against the time, not unlike an EEG, with the waveform peaks being labelled I–VII.

Applications
Identification of retrocochlear pathology (e.g., acoustic neuroma or vestibular schwannoma), identification of coma patients at increased risk of dying, screening hearing in newborns.

Method
Electrodes are attached to the head to record electrical activity from the auditory and other regions of the brain.

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