From an anatomical point of view, the radicular artery of the cervical segment mainly comes from the second segment of the vertebral artery and the ascending branch of the thyrocervical trunk. Because it runs along the spinal nerve root, it is called the radicular artery. At the internal opening of the root canal, the radicular artery is divided into the anterior radicular artery and the posterior radicular artery, which respectively participate in the formation of the anterior central spinal artery and the posterior spinal artery, and mainly supply blood to the cervical cord segments 4 to 7. The symptoms caused by the involvement of the radicular artery branches are consistent with the "anterior central spinal artery ischemia syndrome" and "posterior spinal artery ischemia syndrome" mentioned above, so they will not be repeated. This section mainly explains a series of problems caused by the obstruction of the radicular artery before the branch.