Muscle Atlas

Latissimus Dorsi

Origin: Spinous processes of inferior 6 thoracic vertebrae, thoracolumbar fascia, iliac crest, and inferior 3 or 4 ribs
Insertion: Floor of intertubercular groove of humerus
Action: Extends, adducts, and medially rotates humerus; raises body toward arms during climbing
Innervation: Thoracodorsal nerve (C6, C7, and C8)
Arterial Supply: Thoracodorsal artery

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