Levator labii superioris

The levator labii superioris (Latin: musculus levator labii superioris) 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 labii superioris lifts the upper lip.

Origin

The levator labii superioris originates from the infraorbital 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 expressions of worry and 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 infraorbital branch of the maxillary artery.