NEET PG Medical – 2015 – Question – 99
Stapedius pulls stapes in which direction –
a) Anterior
b) Superior
c) Inferior
d) Posterior
Show Answer
Correct Answer – D
Ans. is ‘D’ i.e., Posterior [Ref: Textbook of auditory processing p. 361
- Contraction of the stapedius muscle pulls the stapes head in posterior direction.
- Contraction of tensor tympani pulls the malleus and tympanic membrane inward with a lateral to medial motion.
- Contraction of these muscles stiffen the tympanic membrane and ossicular chain thereby reducing the mobility of the middle ear and decreasing the sensitivity of ear to air-conducted sound.
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