Falciform crest

The falciform crest, also known as the crista falciformis, is a horizontal ridge that divides the lateral portion of the internal acoustic meatus (IAM) into superior and inferior portions.


The facial nerve (VII) and superior vestibular nerve (SVN) travel in the superior portion of the IAM with the facial nerve anterior to the SVN and separated from it in the lateral portion by Bill bar, a vertical ridge of bone.


The cochlear nerve and inferior vestibular nerve (IVN) run inferior to the falciform crest with the cochlear nerve situated more anteriorly.

Anatomy: Head and neck

Anatomy: Head and neck

Article information

rID: 4518
Section: Anatomy
Tag: refs
Synonyms or Alternate Spellings:
  • Crista falciformis

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Cases and figures

  • Fig 1: nerves of the internal acoustic meatus
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