title: The effect of a knee ankle foot orthosis incorporating an active knee mechanism on gait of a person with poliomyelitis.
abstract: BACKGROUND
  The aim of this case study was to identify the effect of a powered stance control knee ankle foot orthosis on the kinematics and temporospatial parameters of walking by a person with poliomyelitis when compared to a knee ankle foot orthosis.
  
  
  METHODS
  A knee ankle foot orthosis was initially manufactured by incorporating drop lock knee joints and custom molded ankle foot orthoses and fitted to a person with poliomyelitis. The orthosis was then adapted by adding electrically activated powered knee joints to provide knee extension torque during stance and also flexion torque in swing phase. Lower limb kinematic and kinetic data plus data for temporospatial parameters were acquired from three test walks using each orthosis.
  
  
  RESULTS
  Walking speed, step length, and vertical and horizontal displacement of the pelvis decreased when walking with the powered stance control knee ankle foot orthosis compared to the knee ankle foot orthosis. When using the powered stance control knee ankle foot orthosis, the knee flexion achieved during swing and also the overall pattern of walking more closely matched that of normal human walking. The reduced walking speed may have caused the smaller compensatory motions detected when the powered stance control knee ankle foot orthosis was used.
  
  
  CONCLUSIONS
  The new powered SCKAFO facilitated controlled knee flexion and extension during ambulation for a volunteer poliomyelitis person.
authors: Orthotics and Prosthetics Department, Pediatric Neurorehabilitation Research Center, University of Social Welfare and Rehabilitation Science, Tehran, Iran.
authors: Mokhtar
authors: M
authors: Arazpour
authors: Ahmad
authors: A
authors: Chitsazan
authors: Monireh Ahmadi
authors: MA
authors: Bani
authors: Gholamreza
authors: G
authors: Rouhi
authors: Farhad Tabatabai
authors: FT
authors: Ghomshe
authors: Stephen W
authors: SW
authors: Hutchins
mesh_terms: D001696:Biomechanical Phenomena / Q000502:physiology; D011211:Electric Power Supplies; D004867:Equipment Design; D005684:Gait / Q000502:physiology*; D006801:Humans; D007719:Knee Joint / Q000502:physiology*; D008297:Male; D008875:Middle Aged; D009989:Orthotic Devices / Q000145:classification*; D011051:Poliomyelitis / Q000503:physiopathology* / Q000534:rehabilitation*; D016896:Treatment Outcome; D016138:Walking / Q000502:physiology
keywords: Knee ankle foot orthosis; active knee mechanism; gait; poliomyelitis