Korean Journal of Applied Biomechanics (한국운동역학회지)

Korean Society of Applied Biomechanics (한국운동역학회)
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Comparisons of Kinematic Factors and Stiffnesses of the Lower-limb Joints between Transfemoral Amputees and Normal Adults

대퇴절단자와 정상인 걸음걸이의 운동학적 요인과 발목관절 강성 비교

  • Yi, Jae-Hoon (Rehabilitation and Welfare Convergence Research Institute, Korea Nazarene University) ;
  • Lee, Jung-Ho (Innovation & Planing team, LSnetworks) ;
  • Hah, Chong-Ku (Korea Institute of Sports Clinic & Engineering)
  • 이재훈 (나사렛대학교 재활복지 융합 연구원) ;
  • 이정호 (LS네트웍스 선행기획팀) ;
  • 하종규 (한국스포츠클리닉 & 공학 연구소)
  • Received : 2013.02.15
  • Accepted : 2013.03.13
  • Published : 2013.03.31
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Abstract

The purpose of this study was to compare kinematic variables and stiffnesses of ankle joints between normal person and transfemoral amputee gait in order to develop or fit prosthetic leg. Twenty subjects (ten normal persons and ten transfemoral amputees) participated in this experiment, and walked three trials at a self-selected pace. The gait motions were captured with Vicon system and variables were calculated with Visual-3D. The velocity, stride length, stride width, cycle time, double limb support time and right swing time of gaits were statistically significant. Because coefficients of variability of normal persons on velocity, double limb support time and swing time were greater than transfemoral amputees, normal persons controlled these gait variables effectively. The stiffnesses of ankle joints were not statistically significant, but patterns of stiffnesses of ankle joints during three rockers were absolutely different. The negative correlations between stiffnesses of ankle joints and cycle time and swing time were presented. These differences suggest that developing and fitting prosthetic leg were demanded. Further studies should develop fitting program and simulator of prosthetic leg.

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References

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