The first cervical vertebra is called the atlantoaxial vertebra, which is associated with the occipital bone. The second cervical vertebra is called the pivot vertebra, which forms the atlantoaxial joint with the first cervical vertebra, and from the third to the seventh cervical vertebra there are vertebral body hooks, which form the hook vertebral joint with the superior vertebra. When hyperplasia occurs in the hook vertebral joint, the nerve roots and vertebral artery are compressed, leading to cervical spondylosis. There are two transverse foramina in the cervical spine, and when the transverse foramina is narrowed, it will also compress the vertebral artery and cause cervical spondylosis. The 7th cervical vertebra is called the long spine, which is easily felt on the skin surface when the head is lowered, and is used clinically as a marker for counting vertebrae, with intervertebral discs and ligaments connecting the cervical vertebrae.