Head and Neck Anatomy: Part II – Musculature
Levator Labii Superioris

The levator labii superioris originates along a broad area along the lower orbital rim and inserts in the upper lip complex medial to the corner of the mouth. This muscle has a broad insertion that acts to lift the upper lip baring the upper teeth. This muscle along with the next one that will be discussed, the levator labii superioris alaeque nasi, is used to snarl indicting aggression which is more effective in animals that have more imposing canines than humans do, but can be used alone to lift the lip and to show off your new veneers.