NEW! We're excited to announce two new radiology learning pathways by Andrew Dixon and Frank Gaillard LEARN MORE

Posterior ethmoidal nerve

The posterior ethmoidal nerve is an extraconal branch of the nasociliary nerve, a branch of ophthalmic division of the trigeminal nerve. It branches off proximal to the infratrochlear nerve and courses through the medial aspect of the extraconal space of the orbit. It exits the orbit through the posterior ethmoidal foramen to supply the mucosa of the sphenoid and posterior ethmoidal sinuses.

Anatomy: Head and neck

Anatomy: Head and neck

Article information

rID: 52200
System: Head & Neck
Section: Anatomy
Synonyms or Alternate Spellings:

ADVERTISEMENT: Supporters see fewers/no ads

Updating… Please wait.

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

 Thank you for updating your details.