Levator Labii Superioris Muscle
Levator labii superioris is one of the facial muscles that play its role in creating facial expressions. It is divided into three main parts; angular head, intermediate head and lateral head. Hence, it is a combination of three patterns of muscle fibers that extend between the zygoma and lateral sides of the nose in the area just below the eye.
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Omohyoid Muscle Trapezius Muscle Masseter Muscle Orbicularis Oris Muscle Mentalis Muscle Depressor Labii Inferioris Muscle Depressor Anguli Oris Muscle Buccinator Muscle Zygomaticus Major Muscle Zygomaticus Minor Muscle Levator Labii Superioris Muscle Temporal Muscle Orbicularis Oculi Muscle Sternocleidomastoid Muscle Frontalis Muscle
Levator Labii Superioris Muscle
ORIGIN AND INSERTION
Levator labii superioris originates from the infraorbital margin of maxilla and gets inserted to the skin of upper lip.
NERVE SUPPLY
This muscle derives its innervations from the facial nerve (7th cranial nerve) through the buccal branch.
BLOOD SUPPLY
Levator labii superioris is supplied arterially by the facial artery.
FUNCTIONS
It plays a very important role in facial expressions and contributes to it by many ways. It plays a role of the dilators of the mouth. It causes the elevation of upper lip, eversion of upper lip and deepens the nasolabial sulcus. It produces sad expression on deepening the nasolabial sulcus.
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