1 MCQs in ENT for NEET PG
A 35-year-old woman presents with a 2-year history of vertigo triggered by loud sounds and autophony (hearing her own heartbeat and eye movements). Audiometry shows the pattern marked **A** in the diagram — low-frequency air-bone gap with bone-conduction thresholds better than 0 dB HL at 250–500 Hz. Stapedial reflexes are intact bilaterally. High-resolution CT temporal bone in Pöschl plane reveals absence of bone overlying the superior semicircular canal at the floor of the middle cranial fossa. Which of the following best explains the pathophysiology of the conductive-pattern hearing loss in this patient?
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