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NUR1114 MSK Practice Test Study Guide
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NUR1114 MSK Practice Test StudyGuide
Name this muscle and its action - Answer Orbicularis oculi
Closes the eyes
Origin and insertion of orbicularis oculi - Answer Origin: Medial margin of orbit
Insertion: Skin around eyelids
Name this muscle and its action - Answer Orbicularis oris
Closes the lips
Origin and insertion of orbicularis oris - Answer Origin: Maxilla and mandible
Insertion: Skin at corner of the mouth
Name this muscle and action - Answer Buccinator
Compresses the cheek and allow sucking
Origin and insertion of buccinator - Answer Origin: maxilla and mandible
Insertion: fibres of orbicularis oris
Name this muscle and action - Answer Masseter
Elevates the mandible
Origin and insertion of masseter - Answer Origin: zygomatic arch
Insertion: mandible
Name and action of this muscle - Answer Temporalis
Elevates and retracts the mandible
Origin and insertion of temporalis - Answer Origin: temporal bone
Insertion: mandible
Name and action of this muscle - Answer Sternocleidomastoid
When both left and right sternocleidomastoid muscles contract, the neck flexes. When
the left muscle contracts, the head rotates to the right and vice versa
Origin and insertion of sternocleidomastoid - Answer Origin: sternum and sternal end of
clavicle
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