Your upper back (thoracic spine) contains 12 vertebrae (spinal bones) and intervertebral discs that separate and cushion the ...

Medically reviewed by Jennifer Steinhoff, MDThe lumbar spine includes the five vertebrae in your lower back numbered L1 to L5 ...

Ligaments and muscles connect ... a cushion to absorb shock along the spine. Each vertebra is numbered and grouped into 5 regions. Diagram. There are 7 cervical vertebrae in the cervical region. There ...