WELCOME TO FACIAL MUSCLE ANATOMY
1) CORRUGATOR SUPERCILLI
Origin : From the medial end of superciliary arch.
Insertion: Mid- eyebrow skin.
Action : Forehead vertical lines as in frowning.
Nerve supply : FROM Facial nerve ( temporal branch ).
2) ORBUCULARIS OCULI
Origin :
– Maxilla ( frontal process ), Frontal bone ( nasal part ).
– Medial palpebral ligament ( lateral part )
– The lacrimal fascia and the posterior lacrimal crest .
Insertion :
– To the concentric rings return to point of origin .
– To lateral palpebral raphe.
– Passes laterally in front of the tarsal plates of eyelids to the lateral palpebral raphe.
Action :
– Protection of the eyelid by closing the eyelids.
– Lacrimal sac dilation .
Nerve supply : Temporal and zygomatic branches of facial nerve.
3) PROCERUS
Origin : from nasal bone and the lateral nasal cartilage ( upper part ).
Insertion : Skin between eyebrows, and on nasal bridge
Action : Transverse wrinkles.
Nerve supply : FROM Facial nerve ( temporal branch ).
4) COMPRESSOR NARIS
Origin : Maxilla ( lateral to nose ).
Insertion : Aponeurosis ( across the dorsum of nose ).
Action : compression of nasal aperture.
Nerve supply : FROM Facial nerve ( buccal branch ).
5) DIALATOR NARIS
Origin : Maxilla ( over lateral incisor )
Insertion : nose alar cartilage .
Action : dilation of nasal aperture.
Nerve supply :FROM facial nerve ( buccal branch ).
6) DEPRESSOR SEPTI
Origin : medial incisor of maxilla.
Insertion : Nasal septum ( lower mobile part ).
Action : Inferior pull of nose.
Nerve supply : FROM facial nerve ( buccal branch ).
7) ORBUCULARIS ORIS
Origin : Maxilla ( Superior incisivus ), mandible ( inferior incisivus ) .
Insertion : to angle of mouth and lips .
Action : Closure of lip and protrudes lip.
Nerve supply : FROM Facial nerve ( buccal branch ).
8) BUCCINATOR
Origin :
– Maxilla opposite molar teeth ( upper fibers ).
– Mandible , opposite molar teeth ( lower fiber ).
– Pterygomandibular raphe ( middle fiber ).
Insertion :
– to upper lip ( upper fibers )
– to lower lip ( lower fibers )
– middle fibres decussate .
Action : Flatenning of cheeks against teeth and gums , whistling muscle.
Nerve supply : FROM Facial nerve ( buccal branch ).
9) LEVATOR LABII SUPERIORIS ALAEQUE NASI
Origin : Maxillar frontal process .
Insertion : Nose ( alar cartilage ) and upper lip .
Action : Dilation of nostrils and lifts the upper lip .
Nerve supply :FROM Facial nerve ( buccal branch ).
10) ZYGOMATICUS MAJOR
Origin : Lateral surface of zygomatic bone ( posterior aspect ).
Insertion :AT the skin ( at angle of mouth ).
Action : pulling of angle upwards and laterally as in smiling .
Nerve supply : FROM Facial nerve ( zygomatic and buccal branch ).
11) LEVATOR LABII SUPERIORIS
Origin : maxilla ( infraorbital margin )
Insertion : AT skin of upper lip ( upper lateral half ).
Action : Upper lip elevation .
Nerve supply : FROM facial nerve ( buccal branch ).
12) LEVATOR ANGULI ORIS
Origin : Maxilla ( just below infraorbital foramen ).
Insertion : AT the Skin ( of angle of the mouth ).
Action : Elevation of angle of mouth .
Nerve supply : FROM facial nerve ( buccal branch ).
13) ZYGOMATICUS MINOR
Origin : Zygomatic bone ( anterior aspect of lateral surface ).
Insertion : to upper lip ( medial to its angle ).
Action : elevation of upper lip.
Nerve supply : FROM Facial nerve ( Zygomatic and buccal branch ).
14) DEPRESSOR ANGULI ORIS
Origin : From oblique line of mandible.
Insertion :AT the Skin ( at angle of mouth ).
Action : Draws angle of mouth ( laterally and downwards ).
Nerve supply : FROM Facial nerve ( mandibular branch ).
15) DEPRESSOR LABII INFERIORIS
Origin : mandible ( anterior part of oblique line ).
Insertion : Lower lip ( at midline ).
Action : Downward movement of lower lip .
Nerve supply : FROM Facial nerve ( mandibular branch).
16) MENTALIS
Origin : from mandible ( inferior to incisor teeth ).
Insertion :AT the skin ( of chin ).
Action : Elevation and protrudes lower lip as it wrinkles the skin on chin .
Nerve supply : FROM facial nerve ( mandibular branch ).
17) RISORIUS
Origin : Masseter muscle fascia.
Insertion : AT the Skin ( at angle of mouth ).
Action : Retraction of angle of mouth .
Nerve supply : FROM Facial nerve ( buccal branch ).
18) PLATYSMA
Origin : pectoral and deltoid fasciae upper part .
Insertion : Base of mandible ( anterior fiber ), skin of lower face and lip ( posterior fiber ).
Action : Releasing of pressure on skin , mandible depression , downward pull of angle of mouth.
Nerve supply : FROM facial nerve ( cervical branch ).
END OF FACIAL MUSCLE ANATOMY.
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