Effects of Cerebrolysin on Level of Consciousness and Brain Metabolism in Disorder of Consciousness After Stroke: Single Center Randomized Controlled Study

Inclusion Criteria: * Ischemic or hemorrhagic stroke patients * Stroke with CT or MRI diagnosis * Chronic patients with more than 3 months of stroke onset * Patients with vegetative status or minimal consciousness (Coma Recovery Scale -revised: CRS-R) * Age: 19 to 90 years old * A person who voluntarily consents to the clinical trial in writing by the principal or legal representative Exclusion Criteria: * In case of contraindications, including allergies to cerebrolysin * Patients with contraindications to PET * Progressive or unstable stroke * In case of accompanying serious neurogenic disease * Major depressive disorder, schizophrenia, bipolar disorder, dementia, and other serious psychiatric diseases. * History of alcohol or other drug addiction within 3 years of onset * In case of accompanying serious liver, kidney, heart, or respiratory disease * If you have the following medical abnormalities (Total serum bilirubin\> 4 mg/dL, alkaline phosphatase\> 250 U/L, SGOT/AST\> 150 U/L, SGPT/ALT\> 150 U/L, or creatinine) \> 3.5 mg/dL) * In case of having a medical disease that is less than 1 year old * During pregnancy or lactation * Participating in other therapeutic research