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first rib [I]

 

Definition: atypical rib having a single facet on its head, for articulation with the T1 vertebra, and the broadest, shortest and most sharply curved shaft; it also bears two transverse grooves on its superior surface for the subclavian vessels, separated by the scalene tubercle and ridge.

Synonym(s): costa prima [I]TA

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© Copyright 2017 Wolters Kluwer. All Rights Reserved. Review Date: Sep 19, 2016.
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