Quick Facts
Origin: Infraorbital margin.
Insertion: Subcutaneous tissue of upper lip.
Action: Elevates and everts upper lip.
Innervation: Zygomatic and buccal branches of facial nerve (CN VII).
Arterial Supply: Superior labial and infraorbital arteries.
Origin
The levator labii superioris muscle arises from the infraorbital margin, which extends across both the maxilla and zygomatic bones.
Insertion
The levator labii superioris muscle blends with the fibers of the orbicularis oris muscle along the upper lip, between levator labii superioris alaeque nasi and zygomaticus minor muscles.
Actions
The levator labii superioris muscle elevates and everts the upper lip. This action is used when expressing some facial expressions (Standring, 2016).
List of Clinical Correlates
- Bell’s palsy
References
Standring, S. (2016) Gray's Anatomy: The Anatomical Basis of Clinical Practice. Gray's Anatomy Series 41st edn.: Elsevier Limited.
Learn more about this topic from other Elsevier products
Levator Labii Superioris
The LLSAN is a superficial elevator muscle of the nose and the upper lip utilized in oral-facial expression.
