Transversus Thoracis

Joe Muscolino

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The transversus thoracis muscle is seen on the right side of the body.


  • Internal surfaces of the sternum, xiphoid process, and adjacent costal cartilages to the internal surfaces of costal cartilages #2-6.



  • Depress ribs #2-6 at the sternocostal and costospinal joints.



  1. Generally muscles that depress ribs act to create expiration.
  2. The transversus thoracis is located internally within the thoracic cavity.