Inclusion Criteria:  Chronic stroke patients who have passed 6 months or more without additional stroke after the first stroke Patients with upper extremity dysfunction due to stroke (ischemic, hemorrhagic) Patients who can move the upper extremity against gravity with a manual muscle test of grade 3 or higher in the affected shoulder and elbow, respectively Patients who can stably maintain a sitting position Patients who voluntarily agreed to participate in the study  Exclusion Criteria:  Patients with moderate or severe cognitive impairment with a score of 18 or less on the Mini-Mental Status Examination (K-MMSE) Patients with other causes of upper extremity dysfunction, such as peripheral nerve damage, joint disease, etc. Patients with a history of severe vertigo or epilepsy Patients with medical reasons such as medical conditions that make it difficult to participate in research Patients who may be pregnant or who are pregnant or lactating