A medical illustration shows a man with the blunt end of a tuning fork pressed to the cen-ter of his forehead. The man is being tested for which of the following?
a. Sensorineural hearing loss
b. Presbycusis
c. Tinnitus
d. Unilateral conductive hearing loss
D
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A Incorrect. Weber's test with the tuning fork is used to detect conductive hearing loss.
B Incorrect. Presbycusis affects both ears and is of sensorineural origin. The tuning fork test is used to detect conductive hearing loss in one ear.
C Incorrect. Tinnitus is a hearing sensation not caused by an actual sound. The tuning fork test is used to detect hearing loss caused by poor sound conduction.
D Correct. Weber's test, in which a vibrating tuning fork is placed on the center of the forehead, detects differences in hearing between one ear and the other caused by poor sound conduction. During testing, the patient is asked to de-scribe the sensation felt when the tuning fork is activated and then placed on the forehead. If hearing by conduction is intact, the patient will feel vibrations con-ducted through bones of the skull from the tuning fork.
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