What Is a BERA Test?
A brainstem auditory evoked response (BERA) test measures how your brain processes the sounds you hear. The BERA test records your brainwaves in response to clicks or other audio tones that are played for you. The test is also called a brainstem auditory evoked potentials (BAEP) or auditory brainstem response (ABR) test.
A BERA test can help to diagnose hearing loss and nervous system disorders, especially in newborns, young children, and others who may not be able to participate in a standard hearing test.
How Is a BERA Test Performed?
BERA tests are quick and easy, and have virtually no risks or complications. You do not need to prepare for the test in advance, though you may be asked to wash your hair the night before to remove oils that might keep the testing equipment from sticking to your scalp.
You will simply lie back in a reclining chair or on a bed and keep still while the doctor places small electrodes (sticky patches with wires attached) on your scalp and earlobes. The electrodes are connected to a machine that records your brain activity. If your infant or child is being tested and cannot remain still, the doctor may give them a sedative medication.