Latissimus Dorsi

Origin

• Spinous process of vertebrae T7-L5
• Sacrum
• Lower 3-4 ribs
• Iliac crest (posterior 1/3)

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Insertion

• Humerus (intertubercular groove)

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Actions

• Adduction, extension, and medial rotation of the Humerus
• Depression of Scapula

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Vascular Supply

• Thoracodorsal Artery

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Nerve

• Thoracodorsal Nerve (C7,8)

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Clinical Significance

• Quadrilateral Space Syndrome

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See Also

• Physical Exam Shoulder
• Shoulder Anatomy (Main)
• Shoulder Pain (Main)
• Back Anatomy (Main)
• Physical Exam Back
• Back Pain (Main)

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