Auditory Brainstem Response (ABR)
Your ear is made up of three parts—the outer, the middle, and the inner ear. The auditory brainstem response (ABR) test tells us how the inner ear, called the cochlea, and the brain pathways for hearing are working. You may also hear it called an auditory evoked potential (AEP).
The test is used with children or others who cannot complete a typical hearing screening. The ABR is also used if your symptoms might be due to hearing loss in the brain or in a brain pathway.
You will have electrodes put on your head to get ready for the ABR. The electrodes are stuck to your skin and connected to a computer. They record brain wave activity in response to sounds you hear through earphones. All you have to do is rest quietly or sleep during the test. You do not have to say or do anything. The person doing the test will see the results on a computer printout.
ABR can also be used as a screening test in newborn hearing screening programs. A screening is a test where you either pass or fail. When the ABR is used for screening, only one loudness level is checked. The baby passes if his brain shows that it is hearing the sound. If the baby fails the test, more specific testing will be done.