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