Superior Lip Levator, Lateral View

Description

Arising from the infraorbital margin of the maxilla, the levator labii superioris descends almost vertically toward the upper lip, lying medial to the zygomaticus minor and anterior to the masseter in a lateral head and neck view. Superiorly it relates to the orbit and infraorbital foramen region, while its inferior fibers blend with the orbicularis oris and adjacent elevators of the upper lip around the nasolabial fold. Lateral landmarks such as the auricle and temporal fossa frame the facial musculature, with the temporalis and other muscles of mastication positioned posteriorly and superiorly relative to the highlighted facial elevator. Functionally, levator labii superioris elevates and everts the upper lip, contributing to expressions that deepen the nasolabial sulcus and expose the maxillary incisors. This lateral orientation is the one you want when teaching or planning approaches that respect the infraorbital neurovascular bundle, since the infraorbital nerve emerges deep to this plane and can be irritated or injured during midface surgery, laceration repair, or regional anesthesia. Weakness or asymmetry here also reads clinically in facial nerve dysfunction, where upper lip elevation may be blunted even when oral competence remains intact. Good fit for head and neck anatomy teaching on muscles of facial expression, dental and maxillofacial courses discussing local anesthetic blocks, and ENT or plastic surgery materials covering midface incisions and layered closure. It also supports clear labeling in atlases and exam items focused on distinguishing levator labii superioris from levator labii superioris alaeque nasi and zygomaticus minor. Anatomical accuracy verified by SciePro's Medical Advisory Board.