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Deltoid- lateral and posterior fibers
Origin: Scapula
Insertion: Humerous
Action: PRIME MOVER OF ARM EXTENSION AND ABDUCTION, Flexes,abducts, laterally rotates arm
Innervation: Axillary nerve
Supraspinatus ( S in SITS of rotator cuff)
Insertion: Greater tubercle of Humerous
Action: Assists in arm abduction, stabilizes shoulder joint
Innervation: Suprascapular nerve
Infraspinatus (I in SITS of rotator cuff)
Action: PRIME MOVER OF LATERAL ROTATION, stabilizes shoulder joint
Teres Minor (T in SITS of rotator cuff)
Action: PRIME MOVER OF LATERAL ROTATION extends, adducts,
Subscapularis (S in SITS of rotator cuff)
Insertion: Lesser tubercle of Humerous
Action: PRIME MOVER OF MEDIAL ROTATION, stabilizes shoulder joint
Innervation: Subscapular nerve
Teres major
Action: extends, adducts, medially rotates arm
Triceps brachii- long head
Insertion: Ulna
Action: Extends, assists in arm adduction
Innervation: Radial nerve
Latissimus dorsi
Origin: Thoracic/lumbar vertebrae, ribs, iliac crest
Action: PRIME MOVER OF ARM EXTENSION AND ADDUCTION
Innervation: Thoracodorsal nerve
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