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Anterior Ethmoidal Nerve

Medically reviewed by: Stephanie Curreli, MD, PhD
Last Updated: Jun 22, 2015

The anterior ethmoidal nerve passes through the anterior ethmoidal opening and enters the cranial cavity just above the cribriform plate of the ethmoid bone. It is a branching of the nasociliary nerve that supplies branches to the mucous membrane of the nasal cavity and finally emerges between the inferior border of the nasal bone and the side nasal cartilages as the external nasal branch.