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Yousun Koh

Nerves of face and scalp (Anterior view: deep) (English)

Nerves of face and scalp (Anterior view: deep) (English)

The sensory innervation to the face and scalp arises from the trigeminal nerve (CN V) (not visible). The trigeminal nerve divides to give off three branches (ophthalmic (V1), maxillary (V2) and mandibular (V3)) which supply sensory innervation to corresponding regions of the face and scalp. The ophthalmic nerve (CN V1) gives off the supraorbital, supratrochlear, external nasal branch of anterior ethmoidal nerve (see previous image) and infratrochlear nerve to innervate the area from the anterior scalp down to the upper eyelid. The maxillary nerve (CN V2) gives off the infraorbital, zygomaticofacial and zygomaticotemporal nerve to supply the area from the lower eyelid to the upper lip. The mandibular nerve (CN V3) gives off the auriculotemporal nerve, buccal nerve and mental nerve to innervate the lower lip, chin and jaw.
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