Anatomy of the Face - Flipbook - Page 21
Levators (Musculus levator labii superioris)
ORIGIN:
ACTION:
ZYGOMATIC PROCESS OF MAXILLA, MAXILLARY PROCESS OF
ZYGOMATIC BONE
ELEVATES UPPER LIP, EXPOSES MAXILLARY TEETH
INSERTION:
BLENDS WITH MUSCLES OF UPPER LIP
BLOOD SUPPLY:
FACIAL ARTERY, INFRAORBITAL BRANCH OF MAXILLARY ARTERY
INNERVATION:
ZYGOMATIC AND BUCCAL BRANCHES OF FACIAL NERVE (CN VII)
CLINICAL SIGNIFICANCE:
LEVATOR LABII SUPERIORIS IS A SHORT, PAIRED TRIANGULAR
MUSCLE OF THE FACE. IT BELONGS TO THE BUCCOLABIAL
GROUP. BUCCOLABIAL MUSCLES WORK IN SYNERGY TO
CONTROL THE SHAPE, POSTURE AND MOVEMENTS OF THE LIPS.
BY CONTRACTING, LEVATOR LABII SUPERIORIS HELPS OTHER
BUCCOLABIAL MUSCLES TO ELEVATE AND INVERT THE UPPER
LIP. THIS ACTION EXPOSES THE MAXILLARY TEETH AND DEEPENS
THE NASOLABIAL LINES, WHICH HAS AN IMPORTANT FUNCTION
IN SEVERAL FACIAL EXPRESSIONS; SMILING, SMUGNESS AND
CONTEMPT.
LYMPHATIC DRAINAGE
DRAINS INTO THE MANDIBULAR LYMPH NODES
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