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transversus thoracis (muscle)


Definition: internal muscle of thorax; origin, dorsal surface of xiphoid process and lower portion of dorsal surface of body of sternum; insertion, second to sixth costal cartilages; action, contributes to depression of ribs, narrowing chest; nerve supply, intercostal.

Synonym(s): musculus transversus thoracisTA, musculus triangularis sterni, sternocostalis muscle, transverse muscle of thorax

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© Copyright 2018 Wolters Kluwer. All Rights Reserved. Review Date: Sep 19, 2016.