Physical Therapy Korea (한국전문물리치료학회지)

Korean Research Society of Physical Therapy (한국전문물리치료학회)
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Characteristics of Vertical Acceleration at Center of Mass of the Body in Normal Gait

정상보행시 체중심의 수직 가속도 특성

  • Yi, Jin-Bock (Dept. of Biomedical Engineering, The Graduate School, Yonsei University, Institute of Biomedical Engineering, Yonsei University, Research Institute of Medical Instrumentation, Rehabilitation Engineering Yonsei University) ;
  • Kang, Sung-Jae (Dept. of Biomedical Engineering, The Graduate School, Yonsei University, Institute of Biomedical Engineering, Yonsei University, Research Institute of Medical Instrumentation, Rehabilitation Engineering Yonsei University) ;
  • Kim, Young-Ho (Dept. of Biomedical Engineering, The Graduate School, Yonsei University, Institute of Biomedical Engineering, Yonsei University, Research Institute of Medical Instrumentation, Rehabilitation Engineering Yonsei University)
  • 이진복 (연세대학교 보건과학대학 의공학과, 의공학 연구소, 의용계측 및 재활공학 연구센터) ;
  • 강성재 (연세대학교 보건과학대학 의공학과, 의공학 연구소, 의용계측 및 재활공학 연구센터) ;
  • 김영호 (연세대학교 보건과학대학 의공학과, 의공학 연구소, 의용계측 및 재활공학 연구센터)
  • Published : 2002.09.17
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Abstract

In this study, vertical acceleration of center of mass was observed along normal gait phases in 9 healthy male volunteers (aged $25.7{\pm}2.18$). The developed wireless accelerometric device was attached on the intervertebral space between L3 and L4 using a semi-elastic waist belt. A three-dimensional motion analysis system, synchronized with the accelerometry, was used for detecting gait phases. There was no significant correlation between the body weight and the acceleration. The first peak curve covered loading response phase. The second downward peak point was matched accurately with the opposite toe-off. In mid-stance and terminal stance, the acceleration curve highly resembled the vertical ground reaction force curve. There was no significant difference in timing between the final upward peak point and the initial contact. Therefore, the developed accelerometry system would be helpful in determining determine temporal gait pattems in patients with gait disorders.

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