Journal of Biomedical Engineering Research (대한의용생체공학회:의공학회지)

The Korean Society of Medical and Biological Engineering (대한의용생체공학회)
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Comparison of EMG and Muscle Reaction Force to Detect Exercise Intention

운동의도 검출을 위한 근육반력과 근전도의 비교

  • Heo, J.H. (School of Biomedical Engineering, Konkuk Univ.) ;
  • Kim, J.W. (School of Biomedical Engineering, Konkuk Univ.) ;
  • Kwon, Y.R. (School of Biomedical Engineering, Konkuk Univ.) ;
  • Eom, Gwang-Moon (School of Biomedical Engineering, Konkuk Univ.) ;
  • Jeong, K.Y. (Division of Biomedical Engineering, Chonbuk National University) ;
  • Kwon, D.K. (Division of Biomedical Engineering, Chonbuk National University)
  • 허재훈 (건국대학교 의학공학부) ;
  • 김지원 (건국대학교 의학공학부) ;
  • 권유리 (건국대학교 의학공학부) ;
  • 엄광문 (건국대학교 의학공학부) ;
  • 정구영 (전북대학교 바이오메디컬 공학부) ;
  • 권대규 (전북대학교 바이오메디컬 공학부)
  • Received : 2013.02.22
  • Accepted : 2013.04.25
  • Published : 2013.04.30
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Abstract

Activeness of exercise is critical for stroke rehabilitation so that application of stimulation in response to patient's intention would be effective in FES cycling. The purpose of this study was to investigate the relationship between muscle reaction force (MRF) and electromyogram (EMG) during cycling exercise, for the future usage of MRF as patients' intention signal. Seven young men ($24{\pm}1.63$ yrs) participated in this study. Cycling speed was set to 20 RPM and 60 RPM. MRF and EMG were measured in the vastus lateralis muscle of right leg. Active cycling was performed at the maximal load (16 Nm) of an ergometer. Angle dependent artifact in MRF was measured from passive cycling and was subtracted from the MRF of active cycling. The delay of MRF with respect to EMG envelope and their correlation coefficients were derived from the best of cross correlation. MRF was significantly correlated with EMG amplitude in all subjects (p<0.01). Their mean correlations were 0.84 and 0.91 for 20 RPM and 60 RPM, respectively. Mean delay in MRF was 59.14 ms and 53.14 ms for 20 RPM and 60 RPM, respectively. The result suggests that MRF can be used to assess patient's intention for exercise as a substitute to EMG. The method may be applied to FES cycling to encourage patient's effort which is critical for stroke rehabilitation.

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References

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