Hemiparesis occurs with disorders of cerebral circulation, tumors, craniocerebral injuries, purulent and infectious processes, parasitosis, some types of epilepsy, toxic brain damage. The cause of hemiparesis is established by the results of a survey, neurological examination, echoencephalography, radiography, tomography, laboratory tests. Treatment includes pathogenetic and symptomatic therapy followed by restorative measures. Sometimes surgery is required.