Latissimus Dorsi

Parent Structures

• Muscles of the Shoulder

Proximal/Superior Attachment

• 10th Rib - outer surface
• 11th Rib - outer surface
• 12th Rib - outer surface
• 9th Rib - Inconsistent Outer surface
• Iliac Crest - Outer Lip
• Inferior Angle
• Spinous process of 10th Thoracic Vertebrae - Via the Thoracolumbar Fascia
• Spinous process of 11th Thoracic Vertebrae - Via the Thoracolumbar Fascia
• Spinous process of 12th Thoracic Vertebrae - Via the Thoracolumbar Fascia
• Spinous process of 1st Lumbar Vertebrae - Via the Thoracolumbar Fascia
• Spinous process of 2nd Lumbar Vertebrae - Via the Thoracolumbar Fascia
• Spinous process of 3rd Lumbar Vertebrae - Via the Thoracolumbar Fascia
• Spinous process of 4th Lumbar Vertebrae - Via the Thoracolumbar Fascia
• Spinous process of 5th Lumbar Vertebrae - Via the Thoracolumbar Fascia
• Spinous process of 7th Thoracic Vertebrae - Via the Thoracolumbar Fascia
• Spinous process of 8th Thoracic Vertebrae - Via the Thoracolumbar Fascia
• Spinous process of 9th Thoracic Vertebrae - Via the Thoracolumbar Fascia
• Thoracolumbar Fascia - Posterior Layer

Distal/Inferior Attachment

• Intertubercular Groove - Floor of the Intertubercular Groove

Joint Actions

• Agonist
  • Glenohumeral
    • Adduction
    • Extension
    • Medial/Internal Rotation

Nerve Innervation

• Thoracodorsal Nerve