Internal auditory canal nerves (mnemonic)

Last revised by Dr Owen Kang on 26 Apr 2020

A mnemonic to remember the relative position of nerves inside the internal auditory canal (IAC) is:

  • Seven up, Coke down

Anatomy

Four nerves pass through the IAC:

Four are the nerves and four are the quadrants of the IAC: anterosuperior, anteroinferior, posterosuperior, posteroinferior. In each quadrant, there is the passage of one nerve (see picture). In the posterior quadrants are the two vestibular nerves, while in the anterior quadrants are the other two - the mnemonic can be used to remember their position.

Mnemonic

  • Seven up: facial nerve (CN VII) is superior within the canal
  • Coke down: cochlear nerve (CN VIIIc) is inferior within the canal

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Cases and figures

  • Diagram: inner ear
    Drag here to reorder.
  •  Mnemonic: relationship of nerves in the IAM
    Drag here to reorder.
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