The Adult Spinal Column consists of a total of 26 bones known as vertebrae. The first 24 vertebrae, which make up the cervical, thoracic, and lumbar regions of the spine, are movable, while the latter two regions, which make up the sacrum and coccyx, are fused. Prior to adolescence, there are 33 bones, before the bones of the sacrum and coccyx have fused. The sacrum is comprised of 5 vertebrae, while the coccyx is comprised of 4 (rarely 3 or 5) vertebrae. 

​

Adult Spine (26 bones) 

• 7 cervical (C1-C7)

• 12 thoracic (T1-T12)

• 5 lumbar (L1-L5)

• sacrum 

• coccyx   

​

​

Spine (Prior to Adolescence) (33 bones) 

• 7 cervical (C1-C7)

• 12 thoracic (T1-T12)

• 5 lumbar (L1-L5)

• 5 sacral (S1-S5)

• 4 coccygeal   

​

​