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Muscles of the Upper Extremity / Latissimus Dorsi
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| 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 | |
Illustration still under construction |
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