External intercostal membrane

External intercostal membrane
Details
Identifiers
Latin membrana intercostalis externa
Dorlands
/Elsevier
m_08/12522085
TA A03.3.01.002
FMA 10475

Anatomical terminology

Unlike the other two intercostal muscles, the external intercostal muscle does not retain its muscular character all the way to the sternum, and so the tissue in this location is called the external intercostal membrane.

The fibers of the external intercostal muscles run downward and forward between adjacent ribs. Each muscle begins posteriorly at the tubercles of the ribs and extends anteriorly to the costochondral junction, the junction between the costal cartilage and the sternal end of the rib. The muscle between the costal cartilages is replaced by a membranous layer called the external intercostal membrane.

Links and References: Grant's: 1.15, 1.20 Netter: 176 Rohen/Yokochi: 193, 194

See also

Aponeuroses


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