internal auditory canal nerves (mnemonic)

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:

• facial nerve (CN VII)
• three components of the vestibulocochlear nerve (CN VIII)
  • cochlear nerve (CN VIIIc)
  • superior vestibular nerve (CN VIIIvs)
  • inferior vestibular nerve (CN VIIIvi)

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

Siehe auch:

• Nervus facialis
• Nervus vestibulocochlearis