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Question

Pectoralis major
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Muscle Group 4

Muscles That Move the Arm

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Pectoralis major Origin: Clavicle, sternum & ribs (1-6) Insertion: Humerus (intertubercular groove) Action: Adducts, flexes & medially rotates humerus at shoulder joint
Deltoid Origin: Lateral clavicle; scapula (spine & acromion process) Insertion: Humerus (deltoid tuberosity) Action: Abducts, flexes & medially rotates humerus at shoulder joint
Coracobrachialis Origin: Scapula (coracoid process) Insertion: Humerus (shaft) Action: Adducts & flexes humerus at shoulder joint (synergist to pectoralis major)
Latissimus dorsi Origin: Vertebrae (lumbodorsal fascia); Iliac crest & ribs (lower 4) Insertion: Humerus (intertubercular groove) Action: Adducts, extends & medially rotates humerus at shoulder joint
Teres major Origin: Scapula (inferior border & lateral border) Insertion: Humerus (intertubercular groove) Action: Adducts, extends & medially rotates humerus at shoulder joint (synergist to latissimus dorsi)
Created by: michael.itonaga
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