The position of the spine is from the head to the back of the buttocks right in the middle part, which is usually called the keel by the people. The spine is divided into 7 cervical vertebrae, 12 thoracic vertebrae, 5 lumbar vertebrae, 5 sacral vertebrae, and 1 caudal vertebrae, which are connected together with the help of the surrounding intervertebral disc ligaments and muscle tissues to form the thoracic, abdominal, and pelvic cavities, so the spine is an important structure to protect the internal organs and spinal cord, as well as a structure to support the body, known as the pillars of the human body. The spine also has some motor functions and is the backbone of the body. Nerves from the upper extremities emanate from the cervical spine, and nerves from the lower extremities emanate from the lumbar spine. The neck bends and extends forward and backward, and the lumbar bends and extends forward and backward and rotates left and right are all done by the spine, so the spine is a very important part of the body.