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재활운동을 위한 능동형 근전도 바이오피드백 시스템 평가
정현두(H. D. Jung),김주영(J. Y. Kim),이영호(Y. H. Lee),문치웅(C. W. Mun),문창수(C. S. Mun),최흥호(H. H. Choi) 한국재활복지공학회 2012 재활복지공학회논문지 Vol.6 No.1
본 연구에서는 근전도 신호를 기반으로 하여 환자의 재활 운동 시 발생하는 근 피로도의 변화에 따른 능동형 운동 부하 제어 시스템을 개발하였다. 본 능동형 부하 제어 시스템에 적합한 근 파라미터를 선정하기 위해 건강한 남성 12명을 대상으로 사전 실험을 수행하여 근전도 신호를 획득하였다. 또한 선정된 근 파라미터를 이용한 능동형 운동 부하 제어 시스템을 평가하기 위하여 근 골격계 질환이 없는 건강한 남성 10명을 대상으로 실험을 수행하였다. IEMG(Integrated electromyogram) 변화에 따른 운동 부하 변화를 관찰하여 개발된 능동형 부하 제어 시스템의 유용성 및 정확성을 확인하였으며, 개인의 주관적 피로도를 나타내는 운동자각도(rating of perceived exertion)를 활용하여 근 피로도와의 상관관계를 분석하였다. 따라서 본 연구에서 제안한 능동형 운동 부하 제어 시스템은 재활 운동 수행 시 환자 개개인에 적합한 초기 부하 및 운동량 조절에 유용할 것으로 사료된다. In this study, the active exercise load control system was developed that monitors patient’s muscular condition based on EMG signals and controls the load by biofeedback in real-time. In order to select appropriate muscular parameter for the system, the pre-exercise test was performed to obtain EMG signals from healthy 12 males. Subsequently, the main exercise test was performed to evaluate the active exercise load control system based on IEMG: a selected muscular parameter, on healthy 10 males without musculoskeletal disorder. The accuracy and availability of developed system were confirmed through observing changes between exercise load and IEMG. A correlation was analyzed between the fatigue of muscles and RPE indicating the individual subjective fatigue. As a result, the active exercise load control system that was suggested in this study could be useful to control the initial load-balancing and the amount of exercise appropriate for individual in rehabilitation exercise therapy.
서호균(H. G. Seo),윤지영(J. Y. Yun),정현두(H. D. Jung),서민교(M. G. Seo),최흥호(H. H. Choi) 한국재활복지공학회 2010 한국재활복지공학회 학술대회논문집 Vol.2010 No.11
The upper limb paralysis is inability of using arms of upper limb. Typically this paralysis appear to stroke patient who has partial or whole damage of brain and so continuingly generated disability. There are many Rehabilitation therapies. One of them is exercise therapy that is very effective and popular. But exercise therapy is almost affected by patient"s will , so lately concern for the method of interest induction for patient IS mcreasmg Therefore this study suggest that new rehabilitation therapy assistance system development to inspire participation will into a patient and Improve efficiency of upper limb rehabilitation therapy. Algorism of developed system suggest proper difficulty figure pattern following patient"s disease degree . So this rehabilitation therapy method that is drawing this pattern repetitively is applied. In this system, the motor controls patient"s correct motion and infrared ray sensor is attached to bottom of handle to recognize figures. And this system is classified active mode that is voluntary therapy assistant tool to patient and passive mode for patients who have difficulty with voluntary exercise. Through this study, the new therapy tool production that is differentiated with existing therapy tool thorough repeatitive study is possible. As a result, cut of therapy period and maximization of therapy efficiency are expected as induce patient"s voluntary participation about rehabilitation.
근전도 기반 능동형 부하 제어방식의 상지 재활운동 시스템 개발
정현두(H. D. Jung),김주영(J. Y. Kim),민정화(J. H. Min),문동준(D. J. Moon),문치웅(C. W. Mun),최흥호(H. H. Choi) 한국재활복지공학회 2012 한국재활복지공학회 학술대회논문집 Vol.2012 No.4
In this study, the upper limbs rehabilitation with active excise load control system based on EMG was developed. In order to evaluate the usefulness of the developed the upper limbs rehabilitation with active excise load control system, the exercise test was conducted to 6 healthy men without musculoskeletal system disorder. With these test the responsibility of exercise load to the changing of IEMG, and the changing of rating of perceived exertion with the exercise load were discussed. As a result, we confirmed the usefulness with reliability of the developed system and the relations between the rating of perceived exertion of subjects and each parameter. The results of this study could be useful to the individual treatment planning include the initial load-balancing and the amount of exercise.
보행보조차 사용자의 낙상 알림을 위한 낙상감지 방법에 관한 연구
박성현(S. H. Park),이상현(S. H. Lee),이응혁(E. H. Lee),최흥호(H. H. Choi),민홍기(H. K. Min) 한국재활복지공학회 2017 한국재활복지공학회 학술대회논문집 Vol.2017 No.4
Most of the current fall detection is to detect an abnormal value by measuring the acceleration magnitude of the normal gait state. However, it is difficult to distinguish from the situation such as collision with an object and running by the acceleration size alone. Therefore, this study proposes a fall detection method using sum of acceleration magnitudes and gait angle.
등척성 운동 시 근육의 단축성 운동과 신장성 운동에 따른 근피로도 평가
이영호(Y. H. Lee),정현두(H. D. Jung),최흥호(H. H. Choi),문창수(C. S. Mun),문치웅(C. W. Mun) 한국재활복지공학회 2012 재활복지공학회논문지 Vol.6 No.1
본 연구에서는 등척성 운동 시 단축성 운동과 신장성 운동에 따른 이두근과 삼두근의 근피로도 변화를 근전도를 통해 평가하였다. 건강한 남성12명을 대상으로 팔꿈치 관절의 최대 굴곡을 통한 단축성 운동과 최대 신전을 통한 신장성 운동을 수행하였다. 획득한 근전도 신호는 시간 영역과 주파수 영역에서 Integrated EMG(IEMG)와 Mean Power Frequency(MNF)로 분석하였다. 단축성 운동과 신장성 운동 모두에서 이두근과 삼두근의 IEMG는 증가하였고 MNF는 감소하는 경향을 보였다. 하지만 근 피로지수는 운동 방법에 따라 근의 길이가 신장되는 부위에서 더 높게 나타났다. 이러한 결과는 단축성 운동과 신장성 운동에서 근의 피로는 이두근과 삼두근에서 모두 일어나며 근의 길이 변화가 근의 피로에 영향을 미치는 것으로 사료된다. In this study, muscle fatigue of biceps and triceps during isometric exercise depending on concentric contraction and eccentric contraction was evaluated using EMG. 12 healthy male volunteers was performed concentric exercise and eccentric exercise by maximum flection and extension of elbow joint. Integrated EMG (IEMG) in time domain and mean power frequency (MNF) in frequency domain were calculated. MNF of the biceps and triceps was decreased, whereas IEMG was increased during concentric contraction and eccentric contraction. But muscle fatigue index appeared higher at region of stretched muscle length. in this result, muscle fatigue occurs at both biceps and triceps muscle during concentric and eccentric exercise, and muscle fatigue was affected by muscle contraction and extension.