Preferred Label : external intercostal muscle;
Uberon definition : An intercostal muscle that aids in quiet and forced inhalation via elevation of the
ribs, and expanding the transverse dimensions of the thoracic cavity.;
Uberon synonym : intercostales externus;
Uberon related term : intercostales externi muscles; intercostals external muscle; intercostales externi muscle; intercostales externi; intercostalis externus; intercostal muscle external layer; intercostals external; external intercostal muscle; external intercostals;
Uberon Homology note : Behind the thorax, the lateral group (of muscles in reptiles and mammals) remains
essentially as for amphibians. (It breaks into three sheet-like layers: external oblique
muscle, the internal oblique, and the transversus). More anteriorly, however, the
ribs, now enlarged, penetrate and alter this group of muscles. The transversus is
excluded from the thorax and the external and internal obliques become, respectively,
the external and internal intercostal muscles, which contribute to the new function
of ventilation of the lungs.[well established][VHOG];
Uberon Structure note : They extend from the tubercles of the ribs behind, to the cartilages of the ribs in
front, where they end in thin membranes, the anterior intercostal membranes, which
are continued forward to the sternum. Each arises from the lower border of a rib,
and is inserted into the upper border of the rib below. In the two lower spaces they
extend to the ends of the cartilages, and in the upper two or three spaces they do
not quite reach the ends of the ribs. They are thicker than the Intercostales interni,
and their fibers are directed obliquely downward and laterally on the back of the
thorax, and downward, forward, and medially on the front (the example is often used
of sticking one's hands in their pocket and noting the direction of the fingers pointing
downward and medially);
Origin ID : 0005441;
UMLS CUI : C1744535;
Automatic exact mappings (from CISMeF team)
- Semantic type(s)
- UMLS correspondences (same concept)
- Uberon cross reference
- develops from
An intercostal muscle that aids in quiet and forced inhalation via elevation of the
ribs, and expanding the transverse dimensions of the thoracic cavity.
