- 7C, 10T, 4L,5S,3C
- 7C, 12T, 5L, 5S, 4C
- 7C,10T,4L,2S,4C
- 12L,4T,5C,5S
- b
-
(C cervical, T thoracic, L lumber, S sacral, C coccygeal)
(C cervical, T thoracic, L lumber, S sacral, C coccygeal)