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Muscles of the Shoulder

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jaf1022's version from 2015-09-19 19:23

Section 1

Question Answer Column 3 Column 4
Latissimus Dorsi Action- Adducts, extends, and medially rotates shoulderOrigin- T7-L5 spinous process and sacrumInsertion- intertubercular groove of humerus
Teres MajorAction- Extends shoulderOrigin- Lateral border of scapulaInsertion- intertubercular groove of humerus
Pectoralis MajorAction- Medial rotation, horizontally flexes shoulderOrigin- clavicle, sternum, true ribs, and costal cartilageInsertion- intertubercular groove of humerus
CoracobrachialisAction- Flexion and Adduction of the shoulderOrigin- Coracoid process of scapulaInsertion- medial portion of the humerus shaft
DeltoidAction- Abducts shoulderOrigin- Clavicle; acromion process and spine of scapulaInsertion- deltoid tuberosity of humerus
SupraspinatusAction- Abducts shoulderOrigin- supraspinous fossa of scapulaInsertion- greater tubercle of humerus
InfraspinatusAction- Laterally rotates shoulderOrigin- infraspinatus fossa of scapulaInsertion- greater tubercle of humerus
Teres MinorAction- Laterally rotates shoulderOrigin- Lateral border of scapulaInsertion- greater tubercle of humerus
SubscapuarisAction- Medially rotates shoulderOrigin- subscapular fossa of scapulaInstertion- lesser tubercle of humerus
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