Auditory brainstem response

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Auditory Brainstem Response (ABR) (pronunciation: aw-dit-or-ee brain-stem re-sponse) is a neuro-electric response generated in the auditory nerve and brainstem of the human auditory system when a sound stimulus is presented.

Etymology

The term "Auditory Brainstem Response" is derived from the Latin words "audire" meaning "to hear", "brain" from the Old English "brægen", and "response" from the Latin "respondere" meaning "to answer".

Definition

The Auditory Brainstem Response is an electrophysiological measurement used to assess the functional status of the auditory nerve and brainstem pathways in response to sound. It is a non-invasive test that can be performed in newborns, infants, and adults.

Procedure

The ABR test involves placing electrodes on the scalp and earlobes. A series of clicks or tone bursts are presented to the ear through earphones. The electrodes pick up the electrical responses of the auditory nerve and auditory brainstem, which are then recorded and analyzed.

Clinical Significance

The ABR test is used in the diagnosis of hearing loss, auditory neuropathy, and neurological disorders affecting the auditory pathway. It is also used in newborn hearing screening programs to identify infants with congenital hearing loss.

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