KROK 1 2007 – Question 3 · KROK (Medicine) · Physiology
A 60 y.o. patient has a reduced perception of high-frequency sounds. What structures’ disorder of auditory analyzer caused these changes?
- A. Main membrane of cochlea near the oval window
- B. Main membrane of cochlea near helicotrema
- C. Eustachian tube
- D. Tympanic membrane
- E. Muscles of middle ear
Hint
Think of the tonotopic map of the cochlea: which end of the basilar membrane, judged by its stiffness and width, resonates to high pitches, and which end ages first.
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