Auditory Brainstem Response Test (ABR) | 合法醫療器材資訊網

Theauditorybrainstemresponse(ABR)testgivesinformationabouttheinnerear(cochlea)andbrainpathwaysforhearing(auditorynerve).Thistestisalso ...

The ABR is performed by placing sticky electrodes on the head, forehead and earlobes. Earphones are placed in the ear to deliver the click stimulus. The person being tested rests quietly or sleeps while the test is performed. No response is necessary, however the person is instructed to remain relaxed and quiet with their eyes closed for the duration of the test. This is to prevent muscle artifact. ​

As the clicks are delivered through the earphones, the electrodes measure the electrical activity from the auditory pathway. These electrical responses are analyzed by the computer and produce a waveform. The different peaks on the resulting waveform provide information on the time it takes various structures of the auditory pathway to respond following the stimulus. ​

Delayed times of these peaks help in identifying acoustic neuromas (larger than 1 cm) along the auditory pathway. Hearing sensitivity can also be esti...