Frontal nerve

The ophthalmic nerve is responsible for conveying sensory information from the skin of the upper eyelids, forehead, and lateral aspects of the nose. It is formed by the union of the lacrimal, nasociliary, and frontal nerves. The lacrimal nerve transmits sensation from the lateral portion of the upper eyelid and conjuctiva. Additionally, the post-ganglionic visceral motor fibers hitchhike along the lacrimal nerve to the lacrimal gland. The nasociliary nerve emerges from the anterior ethmoidal, posterior ethmoidal, and infratrochlear nerves. The anterior and posterior ethmoidal nerves carry information from the ethmoidal air cells. Meanwhile, the infratrochlear nerve is responsible for conveying information from the medial eyelid and lateral aspect of the nose. The frontal nerve is a branch of the ophthalmic division of the fifth cranial nerve. The frontal nerve emerges from the supratrochlear and supraorbital nerves. The supratrochlear nerve conveys information from the medial portion of the upper eyelid, medial forehead, and bridge of the nose. The supraorbital nerve courses from the forehead through the supraorbital notch to join the supratrochlear nerve.
Written and medically reviewed by the Healthline Editorial Team
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In Depth: Frontal nerve

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