Mechanical action of the intercostal muscles on the ribs

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Science  01 Apr 1983:
Vol. 220, Issue 4592, pp. 87-88
DOI: 10.1126/science.6828883


The external and internal interosseous intercostal muscles were separately stimulated at end-expiratory lung volume in anesthetized dogs. These muscles were all found to elevate the ribs into which they insert. By attaching weights to the ribs, it was determined that the nonlinear compliance of the ribs was responsible for this phenomenon.