Journal of Biomedical Engineering Research (대한의용생체공학회:의공학회지)

The Korean Society of Medical and Biological Engineering (대한의용생체공학회)
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Net Center of Pressure Analysis during Gait Initiation Patient with Hemiplegia : a pilot study

편마비 환자의 보행시작 시 총 압력중심 변화 : 사전연구

  • Hwang, S.H. (Dept. of Biomed. Eng., Graduate School, Yonsei Univ.) ;
  • Park, S.W. (Dept. of Biomed. Eng., Graduate School, Yonsei Univ.) ;
  • Choi, H.S. (Dept. of Biomed. Eng., Graduate School, Yonsei Univ.) ;
  • Kim, Y.H. (Dept. of Biomed. Eng., Graduate School, Yonsei Univ.)
  • 황선홍 (연세대학교 대학원 의공학과) ;
  • 박선우 (연세대학교 대학원 의공학과) ;
  • 최희석 (연세대학교 대학원 의공학과) ;
  • 김영호 (연세대학교 대학원 의공학과)
  • Received : 2009.08.03
  • Accepted : 2010.02.08
  • Published : 2010.02.28
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Abstract

Gait initiation is a transitional process from the balanced upright standing to the beginning of steady-state walking. Dysbalanced gait initiation often causes stroke patients to fall. The net center of pressure, measured by two triaxial force plates from twenty healthy subjects and two stroke patients, was investigated to assess asymmetry of gait initiation in hemiparetic subjects. The time interval and distance of the net center of pressure(CoP) moved from the initiation point to the toe off(S1) and from the toe off to the initial contact(S2) were calculated during gait initiation of normal and stroke patients. When the patient with right hemiplegia(A) initiated his gait with right foot, the time interval and the distance of the net CoP in S1 and S2 were smaller than that of normal subjects' values. However, he initiated the gait with left foot(unaffected side) the time interval and the distance of net CoP in S1 were larger than normative values. Differently, the patient with left hemiplegia(B) has shown that larger time interval and distance in S1 and smaller time interval and distance in S2 in both sides. His asymmetry(with which side the gait initiated) was not significant. It is too early to conclude that these results could be general characteristics of the stroke patients because the variations were large and moreover, the level of motor recovery of the patients was different. However, it is expected that these trials could help to set up the strategy of the therapy for the rehabilitation or prevention of fall in stroke patients.

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References

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