Facial Muscles

Origin: Galea aponeurotica

Insertion: Skin of eyebrows and root of nose

Function: Raise the eyebrows, wrinkles the forehead horizontally

Origin: Frontal and maxiallary bones and ligaments around orbit

Insertion: Tissue of eyelid

Function: Blinking, squinting, draws eyebrows inferiorly

Origin: Arch of frontal bone above nasal bone

Insertion: Skin of eyebrows and root of nose

Function: Draws eyebrows medially and inferiorly, wrinkles the forehead vertically (frowning)

Origin: From fascia over the lower of the nasal bone

Insertion: Into the skin of the lower part of the forehead between the eyebrows

Function: Draws down the medial angle of the eyebrow giving expressions of frowning

Origin: Maxilla

Insertion: Nasal bone

Function: Compresses bridge, depresses tip of nose, elevates corners of nostrils

Origin: Arises directly from maxilla and mandible

Insertion: Encircles mouth; inserts into muscle & skin at angles of mouth

Function:  Closes lips, purses and protudes lips, kissing & whistling

Origin: Zygomatic bone

Insertion: Skin and muscle at corner of mouth

Function: Raises lateral corners of mouth (smiling)

Origin: Lateral fascia associated with masseter muscle

Insertion: Skin at angle of mouth

Function: Draws corner lip laterally, tense of lips, synergist of zygomaticus

Origin: Maxilla

Insertion: Modiolus

Function: draws angel of mouth laterally and superiorly; depresses the nasolabial furrow (face of disgust)

Origin: Body and mandible lateral to its midline

Insertion: Skin and muscle at of lower lip

Function: Draws lower lip inferiorly

Origin: Body of mandible, below incisors

Insertion: skin & muscle at angle of mouth (below insertion of zygomaticus)

Function: Draws corner of mouth laterally & downwardly, antagonist of zygomaticus

Origin: Anterior mandible

Insertion: Chin

Function: Elevates and wrinkles skin on chin

Origin: Molar region of maxilla and mandible

Insertion: Orbicularis oris

Function: Draws corner of mouth laterally, compresses cheek (sucking), hold food between teeth during chewing

Origin: Fascia of chest (over pectoral muscle & deltoid)

Insertion: Lower margin of mandible and skin & muscle at corner of mouth

Function: Depresses mandible, pulls lower lip back and down

Origin: Zygomatic arch and maxilla

Insertion: Angle and ramus of mandible

Function: Prime mover of jaw closure, elevates mandible

Nerve: mandibular nerve (V3)

Origin: Temporal fossa

Insertion: Coronoid process of mandible

Function: Closes, jaw, elevates & retracts mandible, synergist of pterygoids, maintains position of mandible at rest

Nerve: Deep temporal nerve, anterior division of mandibular nerve (V3)

Origin: Medial surface of lateral pterygoid plate of sphenoid bone, maxilla & palatine bone

Insertion: Medial surface of mandible near its angle

Function: Synergist of temporalis & masseter in elevation of the mandible, act with lateral pterygoid to protrude mandible to promote side-to-side movements

Nerve: Medial pterygoid nerve (of mandibular nerve (CN V3))

Origin: Greater wing & lateral pterygoid plate of sphenoid bone

Insertion: Condyle of mandible and capsule of temporomandibular joint

Function: Protrudes mandible, provides forward sliding and side-to-side grinding movements of the lower teeth

Nerve: Lateral pterygoid nerve (of mandibular nerve (CN V3))