The thoracic spine is made up of the middle 12 vertebrae. These
vertebrae connect to your ribs and form part of the back wall of the
thorax (the ribcage area between the neck and the diaphragm). The
thoracic spine's curve is kyphotic, a "C"-shaped curve with the opening
of the "C" in the front. This part of the spine has very narrow, thin
intervertebral discs. Rib connections and smaller discs in the thoracic
spine limit the amount of spinal movement in the mid back compared to
the lumbar or cervical parts of the spine. There is also less space
inside the spinal canal.
