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-unilateral and bilateral contraction
-tilts head to side
-rotates neck so the face points superiorly to opposite side
-when bilateral contraction, they flex the neck
-elevates 1st rib during inspiration when neck is fixed
-lateral flexion (to the same side)
-elevate 1st rib during inspiration when neck is fixed
-adducts and medially rotates humerus
-draws scalpula anterior and inferiorly
-pulls arm across chest
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