Latissimus dorsi

Musculus latissimus dorsi

The broadest muscle of the back, forming part of the posterior axillary fold. It originates from the spinous processes of T7-T12, thoracolumbar fascia, iliac crest, and lower three ribs. It inserts on the floor of the intertubercular sulcus of the humerus.

Type Muscle
Système corporel Muscular
Région corporelle Back
Nom latin Musculus latissimus dorsi
FMA ID 13357

Fonction

Extends, adducts, and medially rotates the arm at the shoulder. A powerful climbing muscle. Also assists in forced expiration (coughing, sneezing) and trunk lateral flexion.

Signification clinique

The latissimus dorsi is used in breast reconstruction and thoracic wall reconstruction. It is the main muscle used in swimming and rowing, susceptible to strain injuries. Thoracodorsal nerve injury causes weakness of arm adduction.

Questions fréquentes

What is the Latissimus dorsi?
The broadest muscle of the back, forming part of the posterior axillary fold. It originates from the spinous processes of T7-T12, thoracolumbar fascia, iliac crest, and lower three ribs. It inserts on the floor of the intertubercular sulcus of the humerus.
What is the function of the Latissimus dorsi?
Extends, adducts, and medially rotates the arm at the shoulder. A powerful climbing muscle. Also assists in forced expiration (coughing, sneezing) and trunk lateral flexion.
What body system is the Latissimus dorsi part of?
The Latissimus dorsi is part of the Muscular.
What conditions affect the Latissimus dorsi?
The latissimus dorsi is used in breast reconstruction and thoracic wall reconstruction. It is the main muscle used in swimming and rowing, susceptible to strain injuries. Thoracodorsal nerve injury causes weakness of arm adduction.
Where is the Latissimus dorsi located?
The Latissimus dorsi is located in the Back region of the body.

Structures associées

musculature muscle group tendon sheath synovial tendon sheath skeletal system set of all bones and joints orbital septum septum orbitale iliopsoas Hyrtl's muscle myocardium cardiac muscle conducting system of heart cardiac conducting system long head of biceps brachii capus longum of biceps brachii

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