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19 terms

Muscle origin/insertion/action

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Orbicularis oris Muscle
Origin: Encircle of the mouth
Insertion: Angle of the mouth
Action: pressing together, tightening and thinning, rolling inward, thrusting outward
Depressor Labii Inferioris
Origin: Mandible
Insertion: lower lip
Action: Irony
Mentalis
Origin: mandible
Insertion: chin
Action: express doubt, raising chin, and protruding lower lip
Depressor Anguli Oris
Origin:Mandible
Insertion: angle of the mouth
Action: frowny
Plastyma
Origin: Clavicle and shoulder
Insertion: angle of the mouth
Action: Raising neck skin, grimacing
Buccinator
Origin: Maxilla, mandible, pterygomandibular raphe
Insertion: Angle of the mouth
Action: Chewing, suckling, expelling air
Levator anguli oris
Origin: Maxilla
Insertion: angle of the mouth
Action: Smile
Zygomaticus major
Origin: zygomatic bone
Insertion: angle of the mouth
Action: smile
Zygomaticus minor
Origin: zygomatic bone
Insertion: upper lip
Action:asisting smiling
Levator labii superioris
Origin: Maxilla
Insertion: Upper lip
Action: elevate the upper lip
Levator Labii superioris alaeque nasi
Origin: Maxilla
Insertion: Ala of the nose and upper lip
Action: Sneering expression
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
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
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
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
Temporalis
Origin: Temporal fossa
Insertion: Coronoid process of mandible
Action: raising the lower jaw/ retrude the jaw
Medial pterygoid
Origin: pterygoid fossa of shpenoid bone

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