Levator labii superioris

Muscles

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The levator labii superioris (pl. levatores labii superioris, also called quadratus labii superioris, pl. quadrati labii superioris) is a muscle of the human body used in facial expression.

It is a broad sheet, the origin of which extends from the side of the nose to the zygomatic bone.

Definition from Wikipedia, CC BY-SA 4.0.