transversus thoracis muscle

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trans·ver·sus thor·a·cis mus·cle

(trans-vĕr'sŭs thōr-ā'sis mŭs'ĕl)
Origin, dorsal surface of xiphoid cartilage 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 thoracis [TA] .
Medical Dictionary for the Health Professions and Nursing © Farlex 2012