KROK 1 2015 – Question 185 · KROK (Medicine) · Physiology
A soldier with explosion-caused trauma was delivered to a hospital. Examination revealed his tympanic membrane to be intact. What defense reflex prevented the tympanic membrane from rupturing?
- A. Contraction of m. tensor tympani
- B. Relaxation of m. tensor tympani
- C. Relaxation of m. stapedius
- D. Relaxation of m. auricularis anterior
- E. Contraction of m. auricularis anterior
Hint
Recall the protective acoustic reflex of the middle ear and ask whether a loud blast should increase or decrease the transmission of vibration through the eardrum and ossicles.
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