Simulating Ankle Joint Misalignments effects in Ankle Foot Orthosis (AFO)

Contents

• ABOUT
• KEYWORDS
• RESEARCH
• REPO FILES
• JOURNAL PAPER

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ABOUT

This Repo constitutes of Research involving:

• Study of "Misalignment effects" between Lower limb structure and an Ankle Foot Orthosis (AFO) in AFO Users & Patients.
• Development of a Mathematical Model to simulate these "Misalignment Effects", and predictions of their resulting harmful effects.

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KEYWORDS

• orthosis
• ankle joint
• biomechanics
• exoskeleton
• pistoning
• misalignments
• gait analysis

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RESEARCH

This Research Work involves:

• Study of "Misalignment Effects" between Lower Limb Structure and an Ankle Foot Orthosis (AFO) in AFO users.
• 2D Link-segment Mathematical model used to simulate relative motion taking place between lower limb and the AFO for a functional range of ankle motion (-20 deg to +20 deg).
• Analysis of relative motions in Anterior-Posterior(A-P) and Proximal-Distal(P-D) directions between the lower limb and the AFO for a set of 4 test cases.
• The set of four test cases involve misalignments in:
  • Anterior to Posterior Direction
  • Proximal-Distal,
  • Anterior-Proximal to Posterior-Distal
  • Posterior-Proximal to Anterior-Distal
• Estimation of Calf Band Travel - Pistoning relative motion between the Lower Limb and the AFO.
• Prediction of Pressure Points on the leg by the inner surfaces of the AFO.

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REPO FILES

MATLAB / AFO_Graphical_Input.m

• MATLAB file for AFO analysis with Graphical Input prompts.
• The file is directly runnable and is fully UI-based wherein the user will be prompted to graphically pick misalignments within a circular range of 20mm radius.

MATLAB / AFO_Live_Script.mlx

• MATLAB dynamic live script file for AFO analysis.
• The file is directly runnable and is helpful for line-by-line retrospection of the code and the backend analysis.

MATLAB / AFO_Manual_Input.m

• MATLAB file for AFO analysis with Manual Input (Typed) prompts.
• The file is directly runnable and is UI-based wherein the user will be required to manually "type" in the misalignments in the input prompt.

MATLAB / AFO_Simulation.m, Simulation.m

• MATLAB files for simulating/calculating relative motions for all 4 misalignment cases considered.

MS Excel / AFO_Analysis.xlsx

• MS Excel file with the dashboard for simulating Gait Analysis.
• Provides UI-based dashboard for analysis as well as visually comprehending the misalignment effects.

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JOURNAL PAPER

DOI: https://link.springer.com/chapter/10.1007/978-3-031-15758-5_15

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