What are most common uses of the brainstem auditory evoked potential (BAEP) testing?

Updated: Oct 25, 2019
  • Author: Andrew B Evans, MD; Chief Editor: Selim R Benbadis, MD  more...
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Answer

Answer

The most common uses of the BAEP are in multiple sclerosis (MS) and in acoustic neuroma. It is a useful screening test, though it has some limitations; magnetic resonance imaging (MRI) may be preferable when a small lesion is under consideration.

Increased I-III interpeak latency indicates a lesion from CN VIII to the superior olivary nucleus, whereas increased III-V interpeak latency suggests a lesion from the superior olivary nucleus to the inferior colliculus ipsilateral to the ear stimulated. Intraoperative monitoring during cerebellopontine angle tumor surgery may be useful in helping the surgeon preserve as much function as possible.


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