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Transversus Thoracis
Region: Chest Muscles · All chest muscles
Transversus Thoracis at a glance
| Origin | Back of the lower sternum and xiphoid process |
|---|---|
| Insertion | Inner surfaces of costal cartilages 2–6 |
| Actions | Depresses the costal cartilages slightly in breathing out |
| Nerve supply | Intercostal nerves |
◆ Good to know
The internal thoracic artery runs just lateral to it on the inside of the chest wall — relevant in coronary bypass surgery, where that artery is harvested.
More Chest Muscles
Please note: This page is an anatomy education summary for students and curious readers, not medical advice. Attachment points are given in their classic short form; individual anatomy varies, and detailed dissection-level descriptions belong in an anatomy atlas.