transversus thoracis muscle
Variety of
transversus thoracis muscle in relation to the internal thoracic artery: an autopsy study of 120 subjects. Schemes showing numerical distribution of different characteristics of the transversus thoracis muscle.
The transversus thoracis muscle is the innermost muscle of the anterior thoracic wall (deep to external intercostal and internal intercostal muscles).
Gross anatomy
The transversus thoracis is a thin band of muscle and tendon arising from the lower posterior surface of the sternum, posterior edge of the xiphisternum and the costal cartilage of the lowest 3-4 ribs at their sternal end. It diverges supero-laterally to attach by slips to the underside of the 2to 6costal cartilages . The transversus thoracis muscle is morphologically identical to the transversus abdominis muscle .
Blood supply
Nerve supply
Action
The transversus thoracis muscle is an accessory muscle of respiration. It depresses the ribs which supports expiration.
Siehe auch:
Assoziationen und Differentialdiagnosen zu Musculus transversus thoracis: