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Facial nerve and its disorders

Question
4 out of 33
 

A patient presents with hyperacusis, loss of lacrimation and loss of taste sensation in the anterior 2/3rd of the tongue. Oedema extends up to which level of facial nerve: (LQ)



A Vertical part

B Vertical part beyond nerve to stapedius

C Vertical part and beyond nerve to stapedius

D Proximal to geniculate ganglion

Ans. D Proximal to geniculate ganglion

In the question patient is presenting with

i. hyperacusis which means nerve to stapedius is involved which arises from the vertical/descending part of facial nerve.

ii. loss of lacrimation - . greater superficial petrosal Nerve which arises from geniculate ganglion is involved.

iii. Loss of taste sensation in anterior 2/3 of tongue - . chorda tympani nerve which arises from vertical/descending part of facial nerve is involved.

Remember:

Any lesion will lead to paralysis of all Nerves distal to it and will spare proximal nerves

• Hence - we will have to look for the most proximal lesion which in this case is geniculate ganglion

• So lesion is either at or proximal to geniculate ganglion

Facial nerve and its disorders Flashcard List

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