Myotonia is the basis for maintaining various body postures and normal movements, and is expressed in various forms, including resting myotonia, postural myotonia, and motor myotonia. When muscle tone is raised or lowered, the human body will exhibit many uncomfortable symptoms, and most patients generally present with high muscle tone. Causes of high muscle tone There are many causes of high muscle tone, such as congenital anomalies, including abnormal brain development due to various causes. 53% of patients with high muscle tone in tetraplegia are related to congenital anomalies; 35% of patients with high muscle tone in non-tetraplegia are due to congenital dysplasia. Overweight infants (less than 2500g): including premature immature infants, full-term small-like infants, which is an important factor in hypertonia. Brain injury is also one of the causes of hypertonia: e.g., brain injury in infants during delivery, cranial injury or brain infection in newborns, cerebrovascular accidents, etc. Brain hemorrhage triggers hypertonia Some patients with spontaneous brain hemorrhage in the clinic can cause hypertonia due to damage to the conus system or extrapyramidal system. Hypertonia can be specifically manifested as straightening of the lower limbs and inward crossing in a scissor-like manner. For example, hypertonicity of both lower limb adductor muscles during crossed legs is manifested, and some of them are similar to convulsions, causing many inconveniences to patients walking normally. In severe cases, the joints of the limbs are contracted and deformed, and the patient is unable to take care of himself. Treatment of myotonia Myotonia does not usually decrease when it is elevated, so patients are advised to take measures to adjust the value to the normal range. Many patients start with rehabilitation to help reduce the muscle tone, but this is a long project that requires patience and long-term perseverance. A more advanced treatment that is now coming into view is surgical reduction of muscle tone, and many people are eager to go to a large hospital in Beijing to receive treatment as they seek the surgical path. Precise regulation of muscle tone and correction of abnormal posture of patients is achieved through preoperative, intraoperative and postoperative electrophysiological myoelectric monitoring.