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Review Question - QID 215007

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QID 215007 (Type "215007" in App Search)
A 70-year-old man is referred to an otolaryngologist for difficulty with hearing in both ears. Over the past couple of months, the patient noticed that he could no longer hear bird songs and chirps when he goes bird-watching. The patient does not endorse any other symptoms. His temperature is 98°F (36.7°C), blood pressure is 128/80 mmHg, pulse is 65/min, and respirations are 14/min. Weber test does not lateralize and Rinne test bilaterally demonstrates air conduction is greater than bone conduction. Pure tone audiometric testing shows normal low-frequency thresholds that slopes downwards in the high-frequency range. Dysfunction of which of the following is most likely responsible for the patient’s symptoms?