Falciform crest

Last revised by Assoc Prof Craig Hacking on 07 Mar 2019

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.

ADVERTISEMENT: Supporters see fewer/no ads

Cases and figures

  • Fig 1: nerves of the internal acoustic meatus
    Drag here to reorder.
  • Updating… Please wait.

     Unable to process the form. Check for errors and try again.

     Thank you for updating your details.