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Muscle Origin Insertion Action (Head & Neck Muscles)
Muscle's origin, insertion, and action
21
Anatomy
Not Applicable
09/24/2012

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Cards

Term
Origin of sternocleidomastoid
Definition
Manubrium of sternum and sternal end of clavicle
Term
Insertion of Sternocleidomastoid
Definition
Mastoid process
Term
Action of Sternocleidomastoid
Definition

Tilts head to the same side; rotates face to the opposite side

Term
Origin of Masseter
Definition
Zygomatic arch
Term
Insertion of Masseter
Definition
Mandibular angle
Term
Action of Masseter
Definition
Elevates mandible
Term
Origin of Orbicularis oculi
Definition
Orbit
Term
Insertion of Orbicularis oculi
Definition
Skin around orbit
Term
Action of Orbitcularis oculi
Definition
Closes eyelids
Term
Origin of Orbicularis oris
Definition
Maxilla and mandible
Term
Insertion of Orbicularis oris
Definition
Lips
Term
Action of Orbicularis oris
Definition
Compresses and purses lips
Term
Origin of Zygomaticus major and minor
Definition
Zygomatic bone
Term
Insertion of Zygomaticus major and minor
Definition
Corner of mouth and upper lip
Term
Action of Zygomaticus major and minor
Definition
Pulls corner of mouth and lip superiorly and laterally
Term
Origin of Sternohyoid
Definition
Manubrium
Term
Insertion of Sternohyoid
Definition
Hyoid
Term
Action of Sternohyoid
Definition
Depresses hyoid bone and larynx
Term
Origin of Platysma
Definition
Skin over lower neck and upper thorax
Term
Insertion of Platysma
Definition
Mandible and skin over lower face
Term
Action of Platysma
Definition
Tenses skin of neck and depresses mandible
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