Levator anguli oris

The levator anguli oris (Latin: musculus levator anguli oris) is a facial muscle located above the upper lip close to the opening of the oral cavity. It is classified as the buccolabial facial muscle. The levator anguli oris lifts the angle of the mouth.

Origin

The levator anguli oris arises from the canine fossa located on the anterior surface of the maxilla right below the infraorbital foramen.

Insertion

The levator anguli oris inserts into the skin at the angle of the mouth.

Action

When activated, the levator anguli oris lifts the angle of the mouth, thus participating in creating a smile. Contractions of this muscle produce a facial expression associated with self-confidence.

Innervation

The levator anguli oris is innervated by the buccal branch of the facial nerve (CN VII).

Blood supply

The levator anguli oris receives arterial blood supply mainly from the superior labial branch of the facial artery.