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Action: Rotates arm laterally Origin - Lateral border of the scapula Insertion - Greater tubercle of humerus Innervation - Axillary nerve (C5,6) from the posterior cord of the brachial plexus

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1.
Action: Rotates arm laterally
Origin - Lateral border of the scapula
Insertion - Greater tubercle of humerus
Innervation - Axillary nerve (C5,6) from the posterior cord of the brachial plexus





 
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