Hemihyperkinesia develops in childhood as a rule as a consequence of meningoencephalitis. The authors operated on 60 patients, performing 76 stereotaxic interventions on the basal ganglia of the brain. It is established that these operations are the only effective method of treatment of the disease. A marked therapeutic effect was noted in over 70 percent of patients, which persists for many years. There were neither fatal outcomes nor stable complications. The best results were produced in one-stage stereotaxic cryodestruction of VL and subthalamic area.