In-silico simulations to study the effects of ankle-joint misalignments in Ankle-Foot-Orthoses during level walking

Contents

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

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ABOUT

This Research Work involves -

• Study of "Misalignment effects" between the lower-limb (shank and foot) and an Ankle Foot Orthosis (AFO) for an AFO-user.
• 2D Link-segment Mathematical model used to simulate relative motion between the lower-limb and the AFO during walking, most common daily life activity.
• Statistical analysis of relative motions calculated for 5 test subjects.
• Estimation of Calf Band Travel / Orthosis Strap Movement.
• Prediction of Pressure Points on the shank and the foot.

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KEYWORDS

• orthosis
• ankle-joint
• biomechanics
• exoskeleton
• pistoning
• misalignments
• pressure points

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RESEARCH

This Research Work involves -

• Study of "Misalignment effects" between the lower-limb (shank and foot) and an Ankle Foot Orthosis (AFO) for an AFO-user.
• 2D Link-segment Mathematical model used to simulate relative motion between the lower-limb and the AFO during walking, most common daily life activity.
• Statistical analysis of relative motions calculated for 5 test subjects.
• Estimation of Calf Band Travel / Orthosis Strap Movement.
• Prediction of Pressure Points on the shank and the foot.

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REPO FILES

MS Excel / AFO_Analysis.xlsx

• MS Excel file with a dashboard for simulating Gait Analysis on both the legs based on the data of 5 able-bodied individuals.
• Provides UI-based dashboard for analysis as well as visually comprehending the misalignment effects.
• Feel free to experiment with the dashboard.

MATLAB / AFO_Main.m

• MATLAB Program to analyze the ankle-joint misalignment effects in AFOs during Walking motion and perform Gait Analysis (based on 5 Gait cycles) on both the legs for user-picked misalignment cases.
• The data considered is based on the data from 5 able-bodied individuals.
• The file is directly runnable and is fully UI-based. The program is capable of prompting the user for 'graphically picked misalignments' as well as 'manually typed misalignments'.

MATLAB / AFO_Main_4Cases.m

• MATLAB Program to analyze the ankle-joint misalignment effects in AFOs during Walking motion and perform Gait Analysis (based on 5 Gait cycles) on both the legs for default (and practically feasible) misalignment cases.
• The data considered is based on the data from 5 able-bodied individuals.
• The file is directly runnable and is UI-based.

MS Excel Preferred_Walking.xlsx

• Filtered and modified data applied on the developed model for "Walking motion".
• The data consists of 2 trials each for about 5 able-bodied individuals.
• Originally published data for the 5 individuals can be found here: https://doi.org/10.1155/2020/8864854

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JOURNAL PAPER

DOI: https://doi.org/10.1016/j.medengphy.2024.104134