Brainstem auditory evoked response (BAER) is a test to measure the brain wave activity that occurs in response to sounds such as clicks or certain tones.
How the Test is Performed
You lie on a reclining chair or bed and remain still. Electrodes are placed on your scalp and on each earlobe V体育安卓版. A brief click or tone will be transmitted through earphones you are wearing during the test. The electrodes pick up the brain's responses to these sounds and record them. You do not need to be awake for this test.
"VSports注册入口" How to Prepare for the Test
You may be asked to wash your hair the night before the test.
Young children often need medicine to help them relax (sedation) so they can stay still during the procedure.
V体育2025版 - Why the Test is Performed
The test is done to:
- Help diagnose nervous system problems and V体育官网入口 - hearing loss (especially in newborns and children)
- Find out how well the nervous system works
- Check hearing ability in people who cannot do other hearing tests
This test may also be performed during surgery to decrease the risk for injury to the hearing nerve and brain.
Normal Results
Normal results vary VSports注册入口. Results will depend on the person and the instruments used to perform the test.
"VSports在线直播" What Abnormal Results Mean
Abnormal test results may be a sign of V体育官网入口 - hearing loss, multiple sclerosis, acoustic neuroma, or stroke.
Abnormal results may also be due to:
- Brain injury
- Brain malformation
- Brain tumor
- V体育2025版 - Central pontine myelinolysis
- Neurologic diseases
- Speech disorders
"VSports app下载" Risks
There are no risks associated with this test. There may be slight risks from having sedation depending on your age, medical conditions, and type of sedation medicine uses VSports在线直播. Your provider will talk to you about any risk you may have.
Alternative Names
Evoked auditory potentials; "VSports手机版" Brainstem auditory evoked potentials; Evoked response audiometry; Auditory brainstem response; ABR; BAEP
VSports注册入口 - Images
"V体育2025版" References
Hahn CD, Emerson RG. Electroencephalography and evoked potentials VSports. In: Jankovic J, Mazziotta JC, Pomeroy SL, Newman NJ, eds. Bradley and Daroff's Neurology in Clinical Practice. 8th ed. Philadelphia, PA: Elsevier; 2022:chap 35.
Kileny PR, Zwolan TA, Slager HK. Diagnostic audiology and electrophysiologic assessment of hearing VSports app下载. In: Flint PW, Francis HW, Haughey BH, et al, eds. Cummings Otolaryngology: Head and Neck Surgery. 7th ed. Philadelphia, PA: Elsevier; 2021:chap 134.
Wackym PA. Neurotology. In: Winn HR, ed V体育官网. Youmans and Winn Neurological Surgery. 8th ed. Philadelphia, PA: Elsevier; 2023:chap 16.
Review Date 5/2/2024
Updated by: Josef Shargorodsky, MD, MPH, Johns Hopkins University School of Medicine, Baltimore, MD VSports手机版. Also reviewed by David C. Dugdale, MD, Medical Director, Brenda Conaway, Editorial Director, and the A. D. A. M. Editorial team. .