Auditory Brainstem Response (ABR), also known as Brainstem Auditory Evoked Response (BAER) or Brainstem Evoked Response Audiometry (BERA), is a neurological test used to evaluate the auditory pathway from the ear to the brainstem. This non-invasive procedure measures the brain’s electrical activity in response to sound stimuli.
Key features of ABR:
- Objective test: Doesn’t require patient participation.
- Quick and painless: Usually takes 30-60 minutes.
- Suitable for all ages: Can be performed on newborns to adults.
- Detects issues in the auditory pathway: From inner ear to brainstem.
The ABR process involves:
- Placing electrodes on the scalp and earlobes.
- Presenting a series of clicking sounds or tone bursts to the ears.
- Recording the electrical activity generated by the auditory nerve and brainstem.
- Analyzing the resulting waveforms for abnormalities.
Applications of ABR include:
- Newborn hearing screening
- Diagnosing hearing loss in infants and difficult-to-test patients
- Identifying neurological disorders affecting the auditory pathway
- Monitoring during surgeries that may affect hearing or brainstem function
- Assessing auditory processing disorders
ABR is a valuable tool in audiological and neurological assessments, providing crucial information about the functioning of the auditory system and brainstem.
