Transversus thoracis muscle
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The transversus thoracis muscle (/trænzˈvɜːrsəs θəˈreɪsɪs/), also known as triangularis sterni, lies internal to the thoracic cage, anteriorly. It is usually a thin plane of muscular and tendinous fibers, however on athletic individuals it can be a thick 'slab of meat', situated upon the inner surface of the front wall of the chest. It is in the same layer as the subcostal muscles and the innermost intercostal muscles.
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Quick Facts Details, Origin ...
Transversus thoracis muscle | |
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Details | |
Origin | Costal cartilages of last 3-4 true ribs, body of sternum and xiphoid process |
Insertion | Ribs/costal cartilages 2-6 |
Artery | Intercostal arteries |
Nerve | Intercostal nerves |
Actions | Depresses ribs |
Identifiers | |
Latin | musculus transversus thoracis |
TA98 | A04.4.01.016 |
TA2 | 2315 |
FMA | 9760 |
Anatomical terms of muscle |
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