BIOL 251: ARM MOVERS

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8 Terms

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Latissimus dorsi (PM)

Prime mover of arm extension, adducts and medially rotates arm

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Deltoid (PM) 

Arm abduction (prime mover); anterior fibers flex and medially rotate humerus; posterior fibers extend and laterally rotate arm

Origin: Clavicle and scapula

Insertion: Deltoid tuberosity of humerus

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Pectoralis major (PM)

Arm flexion (prime mover); adducts and medial rotation of arm

4
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Supraspinatus

Abducts arm

5
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Infraspinatus

Lateral rotation of arm

6
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Teres major

Extends, adducts, and medially rotates arm

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Teres minor

Lateral rotation at shoulder

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Coracobrachialis

Adduction and flexion at shoulder