From the anatomical and physiological point of view of the cervical spine, the cervical spine is more flexible than the thoracic and lumbar spine, and the frequency of activity is also high. The cervical spine has to carry out compound movements in various directions such as forward flexion and backward extension, left and right lateral flexion, left and right lateral rotation, and rotation, while the support structure of the cervical spine is weaker than that of the thoracic and lumbar spine. The thoracic spine is supported by the thoracic and back muscles, and the lumbar spine is supported to some extent by the lumbar muscles and the pelvis. In addition, structures such as the posterior joints of the cervical vertebrae are weaker than those of the thoracic and lumbar vertebrae, so their stability is also poorer than that of the thoracic and lumbar vertebrae. Once high mobility and low stability lose coordination and balance, that is, excessive neck activity or certain factors induce neck instability, will cause the onset of cervical spondylosis, so clinically cervical spondylosis is more common than lumbar spondylosis.