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scapula
no attachment to the posterior ribcage; it attaches to the clavicle at the acromioclavicular joint
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trapezius muscle
spans from the occipital portion of the skull to the twelfth thoracic vertebra. The lower portion of the trapezius depresses the scapulae.
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levator scapulae muscles
elevate the scapulae
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rhomboid muscles
retract the scapulae
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serratus anterior muscles
both stabilize and draw the scapulae toward the front of the ribcage
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supraspinatus
the muscle that makes up the superior portion of the musculotendinous cuff group, from the scapula to the top of the humerus, and which abducts the humerus
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subscapularis
muscle that spans across the front of the scapula, from the vertebral border of the scapula to the anterior humerus, and which medially rotates the humerus
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infraspinatus
muscle that spans from just below the spine of the scapula to the posterior humerus, which laterally rotates the humerus
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teres minor
muscle that spans from the inferior corner of the scapula to the posterior humerus and also laterally rotates the humerus
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muscles participate in scapular
stabilization:
(1) trapezius, (2) serratus anterior, (3) pectoralis minor, (4) rhomboid major, (5) rhomboid minor, (6) levator scapulae
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The muscles of the musculotendinous cuff are:
(1) supraspinatus, (2) teres minor, (3) infraspinatus, (4) subscapularis
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five movements of the scapula:
retraction, protraction, elevation, depression and upward rotation
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