Anterior ethmoidal nerve

Nerve: Anterior ethmoidal nerve
The ophthalmic artery and its branches. (Nerve not pictured, but location is similar to artery.)
Latin	nervus ethmoidalis anterior
Gray's	subject #200 888
From	nasociliary nerve

The anterior ethmoidal nerve is a nerve which provides sensory branches to the nasal cavity. The nerve is the continuation of the Nasociliary nerve after it enters the anterior ethmoidal foramen into the anterior ethmoidal air cells. The nasociliary nerve arises from the Ophthalmic division of the Trigeminal nerve (CN V) within the orbit. The anterior ethmoidal nerve arises only after the nasociliary has given off its four branches - 1) Ramus communicans to ciliary ganglion, 2) Long ciliary nerves, 3) infratrochlear nerve, 4) Posterior ethmoidal nerve. The branches it gives rise to are called the internal and external nasal branches of the anterior ethmoidal nerve, and the external branch ultimately innervates skin on the lateral sides of the nose.

See also

• anterior ethmoidal artery
• ethmoidal foramina

Specifically, innervates the septum of the nasal cavity.

References

• Snell, Richard & Lemp, Michael. Clinical Anatomy of the Eye (Second Edition). Blackwell Science, Inc. First published 1998.

External links

• Anterior+ethmoidal+nerve at eMedicine Dictionary
• MedEd at Loyola GrossAnatomy/h_n/cn/cn1/cnb1.htm
• cranialnerves at The Anatomy Lesson by Wesley Norman (Georgetown University) (V)
• http://www.dartmouth.edu/~humananatomy/figures/chapter_45/45-6.HTM