Levator Anguli Oris

Description

Arising from the canine fossa of the maxilla, the levator anguli oris is shown coursing inferiorly and slightly laterally toward the modiolus at the oral commissure, where its fibers blend with orbicularis oris and the perioral elevator complex. A lateral head and neck orientation also brings adjacent muscles into view, including zygomaticus minor running from the zygomatic bone toward the upper lip, the masseter over the mandibular ramus, and the sternocleidomastoid descending from the mastoid region to the clavicle and sternum. Orbicularis oculi encircles the palpebral fissure superiorly, providing a clear facial layering context for the perinasal and perioral mimetic musculature. Bony landmarks of the maxilla and mandible remain visible beneath the muscular planes. Clear relationships. Functionally, the levator anguli oris elevates and everts the corner of the mouth, a small but decisive contributor to expressions that depend on commissure position rather than lip aperture alone. Its deep location, tucked medial to the zygomaticus group and anchored to the anterior maxilla, makes it a frequent point of confusion with levator labii superioris when teaching the elevators of the upper lip and angle. Clinically, this anatomy matters when planning perioral reanimation or balancing vectors in facial palsy, and when interpreting how midface trauma or maxillary fixation can alter smile dynamics through muscular tethering at the canine fossa. Use this artwork to support head and neck anatomy modules on muscles of facial expression, dissection guides that emphasize the modiolus and its converging fiber systems, and clinical education on facial nerve dysfunction and reconstructive planning around the oral commissure. It also suits textbook figure plates and journal graphics discussing smile mechanics, cheiloplasty, or botulinum toxin injection planning in the midface. Anatomical accuracy verified by SciePro's Medical Advisory Board.