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Evaluation of Insole-equipped Ankle Foot Or thosis for Effect on Gait based on Biomechanical Analysis

인솔 장착형 단하지 보조기의 생체 역학적 분석을 통한 보행 영향성 평가

  • Jung, Ji-Yong (Department of Healthcare Engineering, Graduate School of Chonbuk National University) ;
  • Kim, Jin-Ho (Department of Healthcare Engineering, Graduate School of Chonbuk National University) ;
  • Kim, Kyung (National Rehabilitation Center Research Institute) ;
  • Trieu, Pham Hai (School of Electronics and Computer Engineering, Chonnam National University) ;
  • Won, Yong-Gwan (School of Electronics and Computer Engineering, Chonnam National University) ;
  • Kwon, Dae-Kyu (Division of Biomedical Engineering, College of Engineering, Chonbuk National University) ;
  • Kim, Jung-Ja (Division of Biomedical Engineering, College of Engineering, Chonbuk National University)
  • 정지용 (전북대학교 대학원 헬스케어공학과) ;
  • 김진호 (전북대학교 대학원 헬스케어공학과) ;
  • 김경 (국립재활원 재활연구소) ;
  • ;
  • 원용관 (전남대학교 공과대학 전자컴퓨터공학부) ;
  • 권대규 (전북대학교 공과대학 바이오메디컬공학부) ;
  • 김정자 (전북대학교 공과대학 바이오메디컬공학부)
  • Received : 2010.10.31
  • Accepted : 2010.12.15
  • Published : 2010.12.31

Abstract

The purpose of this study was to evaluate the effects of insole-equipped ankle-foot-orthoses (AFO) on gait. 10 healthy males who had no history of injury in the lower extremity participated in this study as the subjects. The foot of each subject was first scanned, and the insole fit to the plantar was made using BDI-PCO(Pedcad Gmbh, Germany). The subject then was made to walk on a treadmill under four experimental conditions: 1) normal walking, 2) walking wearing AFO, 3) walking wearing AFO equipped with the insole, 4) walking wearing pneumatic-ankle-foot-orthosis (pAFO) equipped with the insole. During walking, foot pressure data such as maximum force, contacting area, peak pressure, and mean pressure was collected using Pedar-X system (Novel Gmbh, Germany) and EMG activity of lower limb muscles such as gastrocnemius medial head, gastrocnemius lateral head, and soleus was recorded using MP150 EMG module (BIOPAC System Inc., USA). Collected data was then analyzed using paired t-test in order to investigate the effects of the insole. As a result of the analysis, when insole was equipped, overall contacting area was increased while both the highest peak pressure and the mean pressure were significantly decreased, and EMG activity of the lower limb muscles was decreased. On the contrary, the cases of wearing AFO showed the decreased contacting area and the increased pressures. Therefore, the AFO equipped with a proper insole fit well to the foot can help comfortable walking by spreading the pressure over the entire plantar.

Keywords

References

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