Posterior ethmoidal nerve

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Nerve: Posterior ethmoidal nerve
The ophthalmic artery and its branches. (Nerve not pictured, but location is similar to artery.)
Latin nervus ethmoidalis posterior
Gray's p.888
Innervates sphenoidal sinus, ethmoidal sinus
From nasociliary nerve

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

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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