Physical Therapy Korea (한국전문물리치료학회지)

Korean Research Society of Physical Therapy (한국전문물리치료학회)
권호 표지

Compensatory Strategy Observed in the Simulated Crouch Gait of Healthy Adults

정상인에서 쭈그림보행 시뮬레이션 시 관찰된 보상적 전략

  • Kim, Tack-Hoon (Dept. of Physical Therapy, Hanseo University) ;
  • Kwon, Oh-Yun (Dept. of Physical Therapy, College of Health Science, Yonsei University, Dept. of Ergotherapy, The Graduate School of Health and Environment, Yonsei University, Institute of Health Science, Yonsei University) ;
  • Yi, Chung-Hwi (Dept. of Physical Therapy, College of Health Science, Yonsei University, Institute of Health Science, Yonsei University) ;
  • Cho, Sang-Hyun (Dept. of Physical Therapy, College of Health Science, Yonsei University, Institute of Health Science, Yonsei University) ;
  • Kwon, Hyuk-Cheol (Dept. of Rehabilitation Technology, Daegu University) ;
  • Kim, Young-Ho (Dept. of Biomedical Engineering, Institute of Medical Engineering, Research Institute for Medical Instrumentation & Engineering, Technology Innovation Center for Medical Instruments, Yonsei University)
  • 김택훈 (한서대학교 물리치료학과) ;
  • 권오윤 (연세대학교 보건과학대학 물리치료학과, 보건환경대학원 인간공학치료학과, 보건과학연구소) ;
  • 이충휘 (연세대학교 보건과학대학 물리치료학과 및 보건과학연구소) ;
  • 조상현 (연세대학교 보건과학대학 물리치료학과 및 보건과학연구소) ;
  • 권혁철 (대구대학교 재활공학과) ;
  • 김영호 (연세대학교 의공학과, 의공학연구소, 의용계측 및 재활공학 연구센터, 첨단의료기기 기술혁신센터)
  • Published : 2004.02.19
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Abstract

This simulation study investigated the characteristics of normal gait, $30^{\circ}$ crouch gait, $30^{\circ}$ crouch/equinus gait, $45^{\circ}$ crouch gait, $45^{\circ}$ crouch/equinus gait. The knee flexion angles were restricted using a specially designed orthosis. This study was carried out in a motion analysis laboratory of the National Rehabilitation Center. Fifteen healthy male subjects were recruited for the study. The purposes of this study were (1) to compare spatiotemporal parameters, kinematics, and kinetic variables in the sagittal plane among the different gait, (2) to investigate the secondary compensatory strategy, and (3) to suggest biomechanical physical therapy treatment methods. The pattern and magnitude observed in each condition were similar to those of normal gait, except the peak knee extension moment of the unrestricted ankle motion-crouch gait. However, the speed of the $45^{\circ}$ crouch gait was half that of a normal gait. The ankle joint moment in the crouch/equinus gait showed the double-bump pattern commonly observed in children with spastic cerebral palsy, and there was no significant difference in gait speed as compared with normal gait. The peak ankle plantar-flexor moment and ankle power generated during the terminal stance in the crouch/equinus conditions were reduced as compared with normal and $45^{\circ}$ crouch gaits (p<.05). The crouch/equinus gait at the ankle joint was an effective compensatory mechanism. Since ankle plantarflexion contracture can be exacerbated secondary to the ankle compensatory strategy in the crouch/equinus gait, it is necessary to increase the range of ankle dorsiflexion and the strength of plantarflexion simultaneously to decrease the abnormal biomechanical advantages of the ankle joint.

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