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Asymmetric Walkway: A Novel Behavioral Assay for Studying Asymmetric Locomotion
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Prosthetic alignment effects on gait symmetry: a case study.

R O Andres1, S K Stimmel

  • 1Department of Exercise Science, University of Massachusetts, USA.

Clinical Biomechanics (Bristol, Avon)
|August 7, 2013
PubMed
Summary
This summary is machine-generated.

Adjusting below-knee prosthesis alignment significantly impacts gait. Even subtle antero-posterior socket shifts alter knee motion and stance, revealing amputee sensitivity to alignment for optimal ambulation.

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Oscillation and Reaction Board Techniques for Estimating Inertial Properties of a Below-knee Prosthesis
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Published on: May 8, 2014

Area of Science:

  • Biomechanics
  • Prosthetics and Orthotics
  • Human Locomotion

Background:

  • Lower extremity amputation alters human ambulation patterns, affecting kinematic, kinetic, and metabolic parameters.
  • Prosthetists aim to optimize gait performance and patient comfort with artificial limbs.

Purpose of the Study:

  • To investigate the influence of antero-posterior prosthesis alignment on sagittal plane gait kinematics in a below-knee amputee.
  • To compare gait parameters between the anatomical and prosthetic limbs.

Main Methods:

  • A case study approach was used to analyze sagittal plane gait kinematics.
  • Antero-posterior alignment of a below-knee prosthesis was varied, and its effects on gait were assessed.
  • Kinematic data were compared between the sound limb and the prosthetic limb.

Main Results:

  • Significant kinematic changes occurred during the prosthetic stance phase, particularly in knee angles, showing asymmetry.
  • Anterior socket displacement led to reduced stance phase, early knee flexion, and toe-off.
  • Posterior socket displacement increased maximum center of gravity height, while anterior displacement decreased it due to increased knee flexion.

Conclusions:

  • Subjectively optimal prosthesis alignment did not always minimize temporal and kinematic asymmetries.
  • The amputee demonstrated subclinical sensitivity to antero-posterior alignment discrepancies, highlighting the importance of precise adjustments.