Latissimus Dorsi - Muscle Physiology & Functional Anatomy

 

Latissimus Dorsi Muscle

Anatomy

 

Origin:

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

 

Insertion:

  • 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

 

 

Physiology

 

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

Antagonists:

Exercises:

 

 


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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