meaning of thoracic
The thoracic spine is unique for several reasons. First, the 12 vertebrae of the thoracic spine (T1 to T12) connect directly to the ribs, meaning that they help the rib cage protect major organs like the heart, lungs and liver. Because they are anchored to the rib cage, the thoracic vertebrae do not have the same range of motion as vertebrae in the neck or lower back and therefore are not at the same risk of developing a degenerative spine condition.