KROK 1 2013 – Question 151 · KROK (Medicine) · Physiology
A male working as a blacksmith has been tested for auditory acuity. The tests revealed 50% hearing loss in the low-frequency range and a near-normal auditory acuity in the high-frequency range. This condition has been caused by the damage to the following structures of the auditory system:
- A. Eardrum
- B. Muscles of the middle ear
- C. Corti’s organ - closer to the oval foramen
- D. Median part of the Corti’s organ
- E. Corti’s organ - closer to helicotrema
Hint
Sound frequency is mapped along the length of the cochlea, so ask which region of the basilar membrane responds best to low tones.
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