Shoulder muscles, action, origin, insertion, and innervation for ID 356
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What are the rotator cuff muscles? | Supraspinatus, infraspinatus, Teres minor, subscapularis
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Supraspinatus - origin | supraspinous fossa
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supraspinatus - action | abduction, some lateral rotation, stabilization
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supraspinatus - innervation | suprascapular
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supraspinatus - insertion | greater tubercule of the humerus
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infraspinatus - origin | infrapsinous fossa
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infraspinatus - insertion | greater tubercle of humerus
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infraspinatus - action | lateral rotation, extension of humerus
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infraspinatus - innervation | suprascapular
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teres minor - origin | upper 2/3 border of scapula
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teres minor - insertion | greater tubercle
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teres minor - action | lateral rotation, horizontal abduction, extension of the humerus
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teres minor - innervation | axillary
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subscapularis - origin | subscapular fossa
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subscapularis - insertion | lesser tubercle of humerus
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subscapularis - action | medial rotation, adduction of humerus
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subscapularis - innervation | upper and lower supscapular
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levator scapula - origin | transverse process of C1 - C4
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Levator scapula - insertion | vertebral border of scapula - superior angle
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levator scapula - action | elevates scapula, downward rotation
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levator scappula - innervation | dorsal scapular nerve and brances of C3-C4
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Serratus anterior - origin | ribs 1-8 or 9
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serratus anterior - insertion | medial border of the scapula
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serratus anterior - action | abduction, protraction, stabilizes
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serratus anterior - innervation | long thoracic
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pectoralis minor - origin | ribs 3-5 near costal cartilage
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pectoralis minor - insertion | coracoid process of scapula
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pectoralis minor - action | stabilizes scapula and downward rotation, depression, proctraction
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pectoralis minor - innervation | medial pectoral nerve
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rhomboid major - origin | T2-T5
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rhomboid minor - origin | C7-T1
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rhomboid major and minor - insertion | vertebral border of scapula
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rhomboid major - action | retraction, rotation, fixes scapula to thoracic wall
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rhomboid minor - action | elevation
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rhomboid major and minor - innervation | doral scapular nerve
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upper, middle and lower trap | external occipital protuberance - C7-T12
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upper trap - insertion | lateral 3rd of acromion process
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middle trap - insertion | spine of scapula
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lower trap - insertion | root of spine of scapula
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upper trap - action | elevation, upward rotation
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middle trap - action | retraction
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lower trap - action | depression, retraction
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upper, middle, and lower trap - innervation | accessory nerve and branches C3, C4
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