Evaluation of Upper-Limb Motor Recovery after Brain Injury: The Clinical Assessment and Electromyographic Analysis

뇌손상 후 상지 운동기능 회복 평가: 임상적 평가 및 운동반응 근전도 분석

  • Kim, Young-Ho (Dept. of Biomedical Engineering, Institute of Medical Engineering, Yonsei University) ;
  • Tae, Ki-Sik (Dept. of Biomedical Engineering, Institute of Medical Engineering, Yonsei University) ;
  • Song, Sung-Jae (Dept. of Mechanical Engineering, Wonju National College)
  • 김영호 (연세대학교 의공학과, 의료공학연구원) ;
  • 태기식 (연세대학교 의공학과, 의료공학연구원) ;
  • 송성재 (원주대학 동력기계과)
  • Published : 2005.02.19


We assessed whether the use of a symmetrical upper limb motion trainer in daily repetitive training for a 6-week period reduced spasticity and improved motor function in three chronic hemiparetic patients. Upper limb motor impairment and disability were measured by the Fugl-Meyer Assessment (FMA), Modified Ashworth Scale (MAS) and Manual Muscle Test (MMT), respectively. The electromyography (EMG) of the affected hand was recorded during isometric wrist flexion and extension. In all patients, FMA and MMT scores were significantly improved after the 6-week training. However, MAS scores of the affected wrist spasticity did not change considerably. Onset and Offset delays in muscle contraction significantly decreased in the affected wrist. The co-contraction ratio of flexor and extensor muscles significantly increased after the 6-week training. Onset and offset delays of the muscle contraction and co-contraction ratio correlated significantly with the patients' FMA. This study showed that repetitive, symmetric movement training can improve upper limb motor functions and abilities in chronic hemiparetic patients. Also, the EMG assessment of motor response is likely to provide insights into mechanisms and treatment strategies for motor recovery in chronic hemiparetic patients.