Effectiveness of Virtual Reality Exercises in STroke Rehabilitation (EVREST)

Inclusion Criteria: * Patient has provided written informed consent prior to entry into the study * In-patient at one of the two study institutions at the time of randomization * Males or females, aged over 18 and younger than 85 * Evidence of stroke confirmed by CT head (ischemic or hemorrhagic) * Time: Onset of symptoms within 6 months prior to randomization * Measurable Chedoke-McMaster scale stage of =\>4 on the "arm" item (10) * Functional independence prior to present stroke (baseline mRS = 0-1) * Patient is alert, medically stable according to the treating physician and able to follow simple verbal commands Exclusion Criteria: * Acute stroke onset more than 6 months ago * Patient is unable to follow verbal commands or has global aphasia * Severe illness with life expectancy less than 3 months (cancer, endocarditis, metastasis with an occult primary malignancy, coagulopathy). * Uncontrolled hypertension according to the treating physician * Unstable angina or recent myocardial infarction (within the last 3 months), current NY Heart Association Class III (marked limitation of physical activity; although patients are comfortable at rest, less-than-ordinary activity leads to fatigue, dyspnea, palpitations, or angina3) or IV (symptomatic at rest; symptoms of CHF are present at rest; discomfort increases with any physical activity) or symptomatic ventricular tachyarrhythmias, as per medical history (a baseline ECG will not be required.) * Any history of seizure, except for febrile seizures of childhood * Participation in another clinical trial involving rehabilitation (recreational therapy, occupational therapy, physiotherapy) or involving an investigational drug. * Patient is unwilling or unable to comply with the protocol or can not/will not cooperate fully with the investigator or study personnel. * Any condition(s) that, in the Investigator's opinion, would a) warrant exclusion from the study (i.e., participation in the study is not in the best interest of the patient) or b) prevent the patient from completing the study. * Any medical condition that might confound the interpretation of results or put the patient at risk (amputation of one extremity).