Posterior ethmoidal nerve

The posterior ethmoidal nerve is a branch of the nasociliary nerve.

Posterior ethmoidal nerve
The ophthalmic artery and its branches. (Nerve not pictured, but location is similar to artery.)
Fromnasociliary nerve
Innervatessphenoidal sinus, ethmoidal sinus
Latinnervus ethmoidalis posterior
Anatomical terms of neuroanatomy

It passes through the posterior ethmoidal foramen, with the posterior ethmoidal artery.

It carries sensory information from the sphenoid sinus and posterior ethmoidal air cells.

It is absent in about 30% of people.

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