Muscle origin/insertion/action

Orbicularis oris Muscle

Origin: Encircle of the mouth Insertion: Angle of the mouth Action: pressing together, tightening and thinning, rolling inward, thrusting outward

Risorius

Origin: Fasia superficial to masseter muscle Insertion: angle of the mouth Action: stretching, retracting, widening to produce grinning or smiling

Depressor Anguli Oris

Origin:Mandible Insertion: angle of the mouth Action: frowny

Zygomaticus major

Origin: zygomatic bone Insertion: angle of the mouth Action: smile

Levator Labii superioris alaeque nasi

Origin: Maxilla Insertion: Ala of the nose and upper lip Action: Sneering expression

Levator labii superioris

Origin: Maxilla Insertion: Upper lip Action: elevate the upper lip

Levator anguli oris

Origin: Maxilla Insertion: angle of the mouth Action: Smile

Buccinator

Origin: Maxilla, mandible, pterygomandibular raphe Insertion: Angle of the mouth Action: Chewing, suckling, expelling air

Temporalis

Origin: Temporal fossa Insertion: Coronoid process of mandible Action: raising the lower jaw/ retrude the jaw

Epicranial

Origin: epicranial aponeurosi Insertion: into the skin tissue of the eyebrown and root of the nose Action: raising eyebrown and scapl when a person showing surprise

Depressor Labii Inferioris

Origin: Mandible Insertion: lower lip Action: Irony

Masseter

Origin: Anterior 2/3, posterior third, medial of zygomatic arch Insertion: anle and ramus of mandible Action: Raising the lower jaw/ occur during closing of the jaw

Plastyma

Origin: Clavicle and shoulder Insertion: angle of the mouth Action: Raising neck skin, grimacing

Lateral pterygoid

Origin: greater wing, lateral pterygoid plate of sphenoid bone Insertion: pterygoid fovea of mandible Action: Lowering the lower jaw/ occur during opening of the jaw

Orbicularis oculi

Origin: infraorbital rim, nasal process of frontal bone, and frontal process of maxilla Insertion: Skin tissue at lateral region of the eye Action: close the eyelid

Mentalis

Origin: mandible Insertion: chin Action: express doubt, raising chin, and protruding lower lip

Corrugator supercilii

Origin: on the frontal bone in the supra orbital region Insertion: skin tissue of the eyebrown Action: cause vertical wrinkle in the gabella and horizontal wrinkle of the nose

Medial pterygoid

Origin: pterygoid fossa of shpenoid bone Insertion: angle of mandible Action: Raising the lower jaw

Zygomaticus minor

Origin: zygomatic bone Insertion: upper lip Action:asisting smiling