Which condition would produce an abnormal brainstem auditory evoked response (BAER)?
A) otosclerosis
B) acoustic neuroma
C) cleft lip
D) vertigo
B
Explanation: A) Otosclerosis in the middle ear will not affect a hearing response in the brain.
B) Correct! An acoustic neuroma on the vestibulocochlear nerve (cranial nerve VIII) will affect a hearing response in the brain.
C) Cleft lip will not affect a hearing response in the brain.
D) Vertigo is in the brain, but it does not affect a hearing response in the brain.
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