Latissimus Dorsi - Muscle Physiology & Functional Anatomy


Latissimus Dorsi Muscle




  • Spinous processes of thoracic T7-T12, thoracolumbar fascia, iliac crest & ribs 9-12



  • Floor (medial side) of intertubercular groove of the (proximal anterior/medial) humerus

Major Artery:

  • Thoracodorsal branch of the subscapular artery


Neural Innervation:

  • Thoracodorsal nerve (C6 - C8)


Trigger Points:

Trigger Points of the Latissimus Dorsi





Concentric Functions:

  • Adducts, extends and internally rotates the humerus


Eccentric Functions:

  • Decelerates flexion, abduction and external rotation of the upper extremity

  • Functions as a bridge between the upper and lower extremity


Isometric Function:

  • Assists in dynamic stabilization of the lumbo-pelvic-hip complex


Related Muscles





More Images of the Latissimus Dorsi Muscle


Latissimus Dorsi


More Information about the Latissimus Dorsi Muscle

The name for the latissimus dorsi muscle is derived from new Latin and literally means broadest (muscle) of the back.


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