KROK 1 2012 – Question 9 · KROK (Medicine) · Physiology
A 60 year old patient has impaired perception of high-frequency sounds. These changes were caused by damage of the following auditory analyzer structures:
- A. Main cochlea membrane near the oval window
- B. Tympanic membrane
- C. Eustachian tube
- D. Main cochlea membrane near the helicotrema
- E. Middle ear muscles
Hint
Think of the tonotopic arrangement of the hearing organ: where along its spiral length is each pitch analysed, and how does the stiffness of that vibrating partition change along the way?
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