Atypical ribs

Last revised by Assoc Prof Craig Hacking on 12 Oct 2020

Owing to their features, the first, eleventh and twelfth ribs are considered atypical ribs. Some authors however describe the second, tenth and eleventh ribs as atypical ribs also.

Of all ribs, the first is the strongest, broadest and most curved. Ribs eleven and twelve are unique, among other reasons, by not being attached to the sternum.

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Cases and figures

  • Figure 1: atypical ribs - 1st (Gray's illustration)
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  • Figure 2: atypical ribs - 2nd (Gray's illustration)
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  • Figure 3: Atypical ribs - 10, 11, 12 (Gray's illustration)
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