Tags: Anatomical Structure, Nerve.

The infratrochlear nerve is given off from the nasociliary nerve just before it enters the anterior ethmoidal foramen. It runs forward along the upper border of the medial rectus and is joined near the pulley of the superior oblique by a filament from the supratrochlear nerve. It then passes to the medial commissure of the eye and supplies the skin of the upper eyelids and bridge of the nose the conjunctiva lacrimal sac and caruncle.

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