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Facial nerve and its disorders

Question
6 out of 33
 

Hyperacusis in Bell's palsy is due to the paralysis of the follwing muscle: [AIIMS May 12]



A Tensor tympani
B Levator palatii

C Tensor veli palatii
D Stapedius

Ans. D Stapedius

Hyperacusis (Phonophobia) occurs due to undue sensitivity to loud sounds.

Stapedius muscle dampens excessive vibrations of the stapes caused by high pitched sounds in order to protect the internal ear.

If this protective reflex is not elicited it indicates stapedius paralysis and results in hyperacusis.

Test

Level of lesion of facial nerve palsy

Schimers test of lacrimation (.J,ed on paralysed side)

HyperacuslS/Phonophobia (undue sensitivity to loud sounds)

.J, ed taste sensation

Salivation test (.J, ed salivation on paralysed side)

Geniculate ganglion

Nerve to Stapedius involved

Chorda tympani nerve involved

Terminal branches-Nerve to submandibular gland involved

Facial nerve and its disorders Flashcard List

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