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Stack #61643 week 4

Stack #61643: Mass 292 week 4

muscleorigininsertionactionnerve
Subclavius first rib clavicle depresses and moves clavicle anteriorly and helps stabilize pectoral girdle subclavian
Serratus anterior superior 8 or 9 ribs vertebral border and inferior angle of scapula ABDUCTS scapula and rotates it upward; elevates ribs when scapula is stabilized, known as "boxer's muscle" (punching and pushing) long thoracic
Pectoralis major clavicle, sternum, and costal cartilages of ribs 2-6 greater tubercle and lateral lup of the intertubercular sulcus of humerus as a whole, adducts and medially rotates arm at shoulder, clavicular head also extends the flexed arm to side of trunk medial and lateral pectoral
Pectoralis minor ribs 2-5, 3-5, or 2-4 coracoid process of scapula ABDUCTS scapula and rotates it downward; elevates ribs during forced inhalation when scapula is fixed medial pectoral
Diaphragm Xiphoid process of sternum, costal cartilages of inferior 6 ribs, lumbar vertebrae and their discs, and rib 12 central tendon contraction of the diaphragm causes it to flatten and increase the bertical dimension of the thoracic cavity, resulting in inhalation; relaxation causes it to move superiorly and decreases dimensions, resulting in exhalation phrenic
Created by: sandy
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