FREE NEET PG MCQ on 07 Nov 2016

Neet Pg

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Question
Vertical crest in fundus of the internal auditory canal is known as:

A. Bill’s bar
B. Ponticulus
C. Cog
D. Falciform crest

TIPSImportant Question from NEET PG

Answer : D. Falciform crest
Explanation : 

Fundus is the lateral end of internal auditory canal. It is made up of a thin bone which is divided into upper and lower part by a transverse crest called falciform crest.

  • Below the falciform crest cochlear nerve is found anteriorly and inferior vestibular nerve is found posteriorly.
  • The facial nerve enters the temporal bone along the posterior face of the petrous bone, piercing the internal auditory meatus. Within the IAC, the dural covering of the facial nerve is transformed to epineurium.


Reference : 
Lustig LR, Niparko JK. Chapter 69. Anatomy, Physiology, & Testing of the Facial Nerve. In: Lalwani AK. eds. CURRENT Diagnosis & Treatment in Otolaryngology—Head & Neck Surgery, 3e.


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