Ribs 3 to 9 are considered typical ribs. Major landmarks of a typical rib are the following: head, neck, tubercle, and body of a rib. The head of each rib is wedge-shaped and has two articular facets, which are separated by the crest of the head.
Which are typical and atypical ribs?
Typical ribs are those numbered 2 to 10 with ribs 1, 11 and 12 considered atypical. Some authors however include ribs 2 and 10 also atypical.
Which ribs are atypical ribs?
The atypical ribs which do not have all these features are:
- First rib.
- Second rib.
- Tenth rib.
- Eleventh rib.
- Twelfth rib.
