Levator labii superioris
Levator labii superioris
The Levator labii superioris (pronunciation: /lɪˈveɪtər ˈleɪbiː aɪ ˈsuːpɪəriːɔːrɪs/) is a muscle of the human face that elevates the upper lip, aiding in facial expressions such as smiling or showing surprise.
Etymology
The term "levator labii superioris" is derived from Latin, where "levator" means 'lifter', "labii" means 'of the lip', and "superioris" means 'upper'. Thus, the term literally translates to 'lifter of the upper lip'.
Anatomy
The levator labii superioris originates from the infraorbital margin of the maxilla, just below the orbit of the eye. It inserts into the skin of the upper lip, blending with the muscles of the orbicularis oris and other surrounding muscles.
Function
The primary function of the levator labii superioris is to elevate the upper lip, exposing the maxillary teeth. This action is crucial in expressions of sadness, disgust, and surprise. It also assists in the deepening of the nasolabial furrow during these expressions.
Related Terms
- Orbicularis oris: A complex of muscles in the lips that encircles the mouth.
- Maxilla: The upper jawbone in vertebrates.
- Nasolabial furrow: The prominent crease running from the nose to the corners of the mouth, deepened by the action of the levator labii superioris.
See Also
External links
- Medical encyclopedia article on Levator labii superioris
- Wikipedia's article - Levator labii superioris
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