Proceedings of the KOSOMBE Conference (대한의용생체공학회:학술대회논문집)
- Volume 1997 Issue 05
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- Pages.398-401
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- 1997
Muscle Contraction and Relaxation Pattern Analysis of Spinal Cord Injured Patient
척추 손상 환자의 근신호 수축 및 이완 패턴 분석
- Lee, Y.S. (Dept. of Rehabilitation medicine, College of Medicine, Inje University) ;
- Lee, J. (Dept. of Rehabilitation medicine, College of Medicine, Inje University) ;
- Kim, H.D. (Pusan National University Hospital) ;
- Park, I.S. (Pusan National University Hospital) ;
- Ko, H.Y. (Dept. of Electronics Engineering, College of Engineering, Seoul City University) ;
- Kim, S.H. (Dept. of Rehabilitation medicine, College of Medicine, Inje University)
- 이영석 (인제대학교 의과대학 재활의학과) ;
- 이진 (인제대학교 의과대학 재활의학과) ;
- 김현동 (부산의대) ;
- 박인선 (부산의대) ;
- 고현윤 (서울시립대학교 공과대학 전자공학과) ;
- 김성환 (인제대학교 의과대학 재활의학과)
- Published : 1997.05.23
Abstract
The EMG signal of spinal cord injured patient is very feeble because that the information from central nervous system is not sufficiently transmitted to molter neuron or muscle fiber. Therefore the observer can not observe contraction and relaxation movement of muscle from the raw EMG signal. In this paper, we propose the muscle contraction and relaxation pattern analysis method of spinal cord injured patient whose EMG signal is composed of the sum of motor unit action potential train with additive white Gaussian noise and impulsive noise. From the EMG model, we denoise impulsive noise using median filter which is a kind of nonlinear filter and the output of median filter is transformed to wavelet transform domain for denoising additive white Gaussian noise using threshold level removal technique. As a result, we can obtain the clear contraction and relaxation pattern.
Keywords