The incidence of the disease is about 15/300,000, mostly in adults, with an average age of 30-40 years and a roughly equal ratio of men to women. The onset of the disease is slow and progressive, and it rarely subsides or remits on its own. The abnormal movement of the head and neck muscles is uncontrollable, often involving bilateral muscle groups, but the degree of involvement is often asymmetrical, resulting in a twisting movement of the head to one side. It is light in the morning, worsens with movement, emotional changes, or sensory stimulation, stops at bedtime, is painful with hypertrophy of the affected muscles, and is negative on neurological examination. The disease itself is not fatal. The clinical manifestations of spastic diagonal neck are varied, most of them have a slow onset and a few have an abrupt onset. The superficial and deep muscles of the neck can be involved, and the muscles involved and the degree of involvement vary from patient to patient, but the contraction of the sternocleidomastoid, trapezius and cephalocervicalis muscle are the most easily manifested. Depending on the extent and degree of involvement of the neck muscles, the clinical manifestations can be divided into four types: 1. rotational type The head rotates spasmodically or clonically around the longitudinal axis of the body to one side. 2. 2.Backward tilting type The head is spasmodically or clonically tilted backward, the chin and face are tilted up, and the cervical vertebrae are bowed forward. 3.Front flexion type The head makes spastic or clonic forward flexion to the chest. 4.Lateral contracture type The head deviates from the longitudinal axis of the body and makes spastic or clonic lateral flexion to the left or right. In severe cases, the ears and temporal part of the head are close to or close to the shoulders, and often accompanied by the phenomenon of lifting the ipsilateral shoulder upward, shortening the distance between the ear and the shoulder. In most patients with spastic squint, the muscle contraction frequency is greater than 10 times/s, and the head is tensed in one direction, which is called spastic; in a few patients, the muscle contraction frequency is less than 10 times/s, and the head is twitched in one direction, which is called clonic. Like other extrapyramidal disorders, the clinical manifestation of spastic squint is lighter in the morning when waking up, and the symptoms are aggravated when nervous, impulsive or laboring, walking or various body organs are stimulated, and the symptoms are reduced when quiet, and disappear after sleeping. Patients often hold their heads by themselves with their hands when waking up, and when the symptoms are gradually obvious, it affects patients’ daily life and psychological state. Long-term abnormal head movement can show different degrees of thickening and hypertrophy of the affected muscles, and the antagonistic muscles on the opposite side are in a state of relaxation and disuse, and even have different degrees of muscle atrophy. In mild cases, there may be no myalgia, but in severe cases, there is often severe myalgia. A small number of patients have tremor, and occasionally patients have dysphonia and dysphagia. Diagnosis The diagnosis of this disease is relatively easy, but it is more difficult to identify the affected muscles. It is based on the fact that it has specific clinical manifestations, cervical muscle spasm or clonus that makes the head deviate to one side, and neurological examination (including conus system, extrapyramidal system and cerebellar function, sensation, etc.) are within the normal range. Due to long-term muscle spasm, the affected muscles are often abnormally firm and hypertrophied. There are no abnormal findings on cranial CT and EEG. The diagnosis of spastic diagonal neck can be made based on the symptoms. Combined with palpation, electromyography, local block, and the performance of the neck muscles, a comprehensive analysis of the patient is performed to make a clinical diagnosis and a list of affected muscles, and then a treatment plan is formulated. We perform a variety of surgical procedures for the treatment of spastic oblique neck, including selective posterior spinal nerve rhizotomy, paraneoplastic nerve branch dissection, pallidum destruction, and deep brain electrical stimulation. The total number of cases is hundreds, and the efficiency is over 90%. Preoperative 1 postoperative 1 preoperative 2 postoperative 2 preoperative 3 postoperative 3 preoperative 5.