Nervus intermedius

The nervus intermedius, also known as nerve of Wrisberg, is a part of the facial nerve (CN VII) which contains somatic sensory, special sensory, and visceral motor (secretomotor) fibres 1.

Nuclei
  • superior salivary nucleus
  • nucleus of the tractus solitarius
    • receives taste information from the anterior two-thirds of the tongue (via chorda tympani)
  • sensory nuclei of the trigeminal nerve
Course

The nervus intermedius exits the brainstem at the boundary between the pons and the inferior cerebellar peduncle lateral to the motor root of the facial nerve and medial to the vestibulocochlear nerve (in close proximity to the pontomedullary junction). It travels with the motor root of the facial nerve through the cerebellopontine angle towards the internal acoustic meatus where it enters the anterior superior quadrant to travel through the petrous temporal bone. At the geniculate ganglion (at the first genu) it joins the motor root of the facial nerve 1,2.

Branches

Branches of the facial nerve including 1,2:

MRI
  • not visible on CT or 1.5T MRI
  • best appreciated on axial 3T MRI through the cerebellopontine angle travelling towards the internal acoustic canal 3

First documented by German anatomist Heinrich August Wrisberg (1736-1808) in 1777, although likely first described by Eustachius in 1563 5,6


Neuroanatomy
Share article

Article Information

rID: 29708
Section: Anatomy
Synonyms or Alternate Spellings:
  • Nerve of Wrisberg
  • Nervus intermedius of Wrisberg

Support Radiopaedia and see fewer ads

Updating… Please wait.
Loadinganimation

Alert accept

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

Alert accept Thank you for updating your details.