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Measurement of Dynamic Scapular Kinematics Using an Acromion Marker Cluster to Minimize Skin Movement Artifact
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Marker cluster rigidity in a multi-segment foot model.

Po-Hsiang Chan1, Julie Stebbins2, Amy B Zavatsky1

  • 1Department of Engineering Science, University of Oxford, Oxford, UK.

Journal of Biomechanics
|January 23, 2019
PubMed
Summary
This summary is machine-generated.

The rigid body assumption in multi-segment foot models (MSFM) may be inappropriate, especially for the forefoot. This study quantified marker cluster deformation during gait, revealing significant forefoot and tibia movement.

Keywords:
Foot modelForefootGait analysisMarker clusterRigidity

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Area of Science:

  • Biomechanics
  • Orthopedics
  • Gait Analysis

Background:

  • Multi-segment foot models (MSFM) are crucial for diagnosing and treating foot deformities.
  • These models simplify the leg and foot into rigid segments, a simplification potentially problematic for the flexible forefoot.

Purpose of the Study:

  • To investigate the validity of the rigid body assumption for marker clusters in a common MSFM.
  • To quantify the deformation of tibia, hindfoot, and forefoot marker clusters during a gait cycle.

Main Methods:

  • Calculated the rigid body error (σRBE) for marker clusters in 64 healthy adults during gait analysis.
  • Analyzed deformation patterns of tibia, hindfoot, and forefoot clusters across the gait cycle.

Main Results:

  • The hindfoot cluster showed minimal deformation.
  • The forefoot cluster exhibited significant deformation, particularly at the stance phase's beginning and end.
  • The tibia cluster deformed throughout the gait cycle, mirroring knee flexion patterns.

Conclusions:

  • The rigid body assumption in MSFMs warrants re-evaluation, especially concerning the forefoot.
  • Findings suggest current MSFM simplifications may not accurately represent foot biomechanics during gait.