Thorax Muscle Anatomy. The muscles of the thoracic spine are arranged in layers. Together these muscles alter the volume of the thoracic cavity through moving the rib cage appropriately during respiration.
Sternalis muscle Pectoralis major. Posterior surface of the sternum. Anatomy Thorax Muscles The thoracic wall is made up of five muscles.
Thoracic Cage The bony part of thoracic wallThe bony part of thoracic wall - 12 pairs of ribs CC- 12.
The muscles that make up the thorax wall include the three intercostal muscles external internal and innermost the subcostalis and the transversus thoracis. Protection of thoracic viscera 2. Compresses the thorax for forced expiration. These muscles are primarily responsible for changing the volume of the thoracic cavity during respiration.
