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Internal intercostal muscles information


Internal intercostal muscles
Internal intercostal muscles (red) seen from back.
Details
OriginRib - superior border
InsertionRib - inferior border
ArteryIntercostal arteries
NerveIntercostal nerves
ActionsHold ribs steady
AntagonistExternal intercostal muscles
Identifiers
Latinmusculi intercostales interni
TA98A04.4.01.013
TA22312
FMA74085
Anatomical terms of muscle
[edit on Wikidata]

The internal intercostal muscles (intercostales interni) are a group of skeletal muscles located between the ribs. They are eleven in number on either side. They commence anteriorly at the sternum, in the intercostal spaces between the cartilages of the true ribs, and at the anterior extremities of the cartilages of the false ribs, and extend backward as far as the angles of the ribs, hence they are continued to the vertebral column by thin aponeuroses, the posterior intercostal membranes. They pull the sternum and ribs upward and inward.

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