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***Origin: acromion, the length of the scapular spine
 
***Origin: acromion, the length of the scapular spine
 
***Insertion: deltoid tuberosity on the humerus, fascia of the lateral arm
 
***Insertion: deltoid tuberosity on the humerus, fascia of the lateral arm
 +
***Action: Flexor of Shoulder, Abductor and outward rotator of the arm
 
**'''Teres Major'''
 
**'''Teres Major'''
 
***Origin: dorsal part of the caudal scapula  
 
***Origin: dorsal part of the caudal scapula  
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