Seoul National University Graduate School 1 article published in JoVE Bioengineering Robotic Mirror Therapy System for Functional Recovery of Hemiplegic Arms Jaewon Beom*1,2, Sukgyu Koh*3, Hyung Seok Nam1, Wonshik Kim3, Yoonjae Kim3, Han Gil Seo4, Byung-Mo Oh4,5, Sun Gun Chung4,5, Sungwan Kim1,6 1Department of Biomedical Engineering, Seoul National University College of Medicine, 2Department of Rehabilitation Medicine, Chungnam National University Hospital, 3Interdisciplinary Program for Bioengineering, Seoul National University Graduate School, 4Department of Rehabilitation Medicine, Seoul National University Hospital, 5Seoul National University College of Medicine, 6Institute of Medical and Biological Engineering, Seoul National University We developed a real-time mirror robot system for functional recovery of hemiplegic arms using automatic control technology, conducted a clinical study on healthy subjects, and determined tasks through feedback from rehabilitation doctors. This simple mirror robot can be applied effectively to occupational therapy in stroke patients with a hemiplegic arm.