Anatomy, Head and Neck, Eye Levator Labii Superioris Muscle

The levator labii superioris muscle is a three-part muscle useful for facial expression, and it runs down alongside the lateral aspect of the nose. Its primary function is in raising the upper lip. It is also involved in movements such as facial expressions, actions of disgust, retching (vomiting), disdain, and even to show oral content. Its general origin is on the lateral aspect of the nose and extends to the zygomatic bone. The levator labii superioris receives its blood supply from the facial artery and the infraorbital branch of the maxillary artery. The buccal branch of the facial nerve or cranial nerve VII innervates the levator labii superioris.