The thoracic spine is part of our vertebrae, and the length of the thoracic spine is the longest part of the spine, while the length of the cervical, lumbar, and sacrococcygeal vertebrae is relatively shorter. The overall position is in the midline of our back, the uppermost 1st thoracic vertebra is connected to the bottom of our cervical vertebra, the specific position is in the lower edge of the back of the neck when we lower our head, there will be an obvious protruding bulge position, which is the upper edge of the 1st thoracic vertebra, and the lowermost 12th thoracic vertebra is connected to the top of our lumbar vertebra, at the bottom of our back, the last rib at the junction with the lumbar, which is the 12th rib. The middle vertebrae to which the 12th rib is attached is the 12th thoracic vertebra. Although the thoracic vertebrae are basically similar to the cervical and lumbar vertebrae in terms of morphology and structure, the overall mobility of the thoracic vertebrae is much smaller compared to the lumbar and cervical vertebrae, and the thoracic vertebrae are generally only able to move slightly and not to flex and extend significantly, but long-term sustained external force can also cause the overall deformity of the thoracic vertebrae.