Anatomy of the Face - Flipbook - Page 20
Levators (Musculus levator anguli oris)
ORIGIN:
ACTION:
CANINE FOSSA OF MAXILLA
ELEVATES ANGLE OF MOUTH
INSERTION:
CLINICAL SIGNIFICANCE:
MODIOLUS
LEVATOR ANGULI ORIS IS A PAIRED STRAP-LIKE MUSCLE OF THE
FACE, LOCATED ABOVE THE ANGLES OF THE LIPS. IT BELONGS
TO
A
LARGE
GROUP
OF
MUSCLES
OF
FACIAL
EXPRESSION CALLED THE BUCCOLABIAL GROUP. ITS FUNCTION
CONTRIBUTES TO PRODUCING FACIAL EXPRESSIONS BY
CONTROLLING THE SHAPE, POSITION AND MOVEMENTS OF THE
LIPS. SPECIFICALLY, IT DOES SO BY ELEVATING THE ANGLE OF
THE MOUTH AND DEEPENING THE NASOLABIAL LINES,
FACILITATING SMILING.
BLOOD SUPPLY:
SUPERIOR LABIAL BRANCH OF FACIAL ARTERY, INFRAORBITAL
BRANCH OF MAXILLARY ARTERY
INNERVATION:
ZYGOMATIC AND BUCCAL BRANCHES OF FACIAL NERVE (CN VII)
LYMPHATIC DRAINAGE
THE LYMPH DEPOSITS INTO THE SUBMANDIBULAR LYMPH NODES, BUT
ADDITIONALLY INTO THE BUCCINATOR AND PAROTID LYMPH
NODES
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