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Levator labii superioris

The levator labii superioris (also levator labii superioris muscle, latin: musculus levator labii superioris) is a facial muscle located close to the mouth opening, which lifts the upper lip.

Origin

The levator labii superioris originates from the infra-orbital margin of the maxilla.

Insertion

The levator labii superioris inserts into the skin of the upper lip.

Action

Upon activation the levator labii superioris lifts the upper lip.

Contractions of the muscle produce facial expression of worry, anxiety.

Innervation

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

Blood supply

The levator labii superioris receives blood supply from the facial artery and the infraorbital branch of the maxillary artery.