For example, the first rib attaches to the first thoracic vertebra (i.e. T-1); the 12th (last) rib attaches to the last vertebra of the thoracic spine (i.e., T-12). The thoracic spine serves many ...

Each vertebra is numbered and grouped into 5 regions. Diagram. There are 7 cervical vertebrae in the cervical region. There are 12 thoracic vertebrae in the thoracic region. There are 5 lumbar ...