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Muscle Origins, Insertions, and Actions

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Muscle
Origin
Insertion
Action
Region
Scalenus Anterior   Transverse processes of 3rd through 6th cervical vertebrae   Inner border of first rib   Raises 1st rib; acting bilaterally they flex neck, acting unilaterally they laterally flex and rotate the neck.   Neck  
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Scalenus Medius   Transverse processes of C2-C7   Upper surface of first rib   Raises first rib; bilaterally flex the neck, unilaterally they laterally flex or rotate the neck   Neck  
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Scalenus Posterior   Transerse processes of C5-C7   Outer surface of 2nd rib   Raises 2nd rib; Acting together the flex the neck; acting on one side the laterally flex, rotate neck   Neck  
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Rectus Capitis Posterior Major   Spinous process of axis   Lateral portion of inferior nuchal line   Extends head, rotates head   Neck  
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Created by: msjessegrrl
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