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Transversus thoracis

Other Terms: Musculus transversus thoracis, Muscle transverse du thorax

Muscle parts

None

Latin name

Musculus transversus thoracis

Latin muscle parts

None

Group

Thoracic wall – lateral musculature – internal layer

Etymology

In English, this muscle’s name is the crosswise muscle of the chest. The Latin term transversus means “crosswise” and comes from Latin trans meaning “across, beyond, or through” and the Latin verb vertere meaning “to turn.” The word thoracis comes from the Greek thorakos meaning “breast plate or chest.”

Origin

Inner lower portion of sternum and adjacent costal cartilages

Insertion

Lower border of sternal ends of ribs 2 through 6

Action

Depresses the ribs.

Nerve supply

Intercostal nerves (T3 through T6)

Blood supply

These muscles receive their blood supply from the sternal branches and anterior intercostal branches of the internal thoracic artery via the subclavian artery.

Latin

Musculus transversus thoracis

French

Muscle transverse du thorax

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