The Probert Encyclopaedia of Medicine

LEVATOR LABII SUPERIORIS

The levator labii superioris is a thin muscle with a quadrilateral form. It originates near the lower edge of the occular orbit (orbit of the eye) immediately above the maxillary foramen and is inserted in the muscular tissue of the orbicularis oris muscle of the upper lip. The levator labii superioris is innervated by the facial nerve (VII cranial nerve) and supplied by the facial artery. This muscle elevated the upper lip.
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