Biomechanical Analysis of the Three-Dimensional Foot Structure During Gait: A Basic Tool for Clinical Applications

[+] Author and Article Information
A. Gefen, M. Arcan

Department of Biomedical Engineering, Faculty of Engineering, Tel Aviv University, Tel Aviv 69978, Israel

M. Megido-Ravid, Y. Itzchak

Department of Diagnostic Imaging, The H. Sheba Medical Center, Tel Hashomer 52621, Israel

J Biomech Eng 122(6), 630-639 (Jul 09, 2000) (10 pages) doi:10.1115/1.1318904 History: Received September 22, 1999; Revised July 09, 2000
Copyright © 2000 by ASME
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The CPD/DRF integrated experimental analysis: (a) the experimental setup and (b) representative CPD/DRF data of a normal foot structure during various discrete stages of the stance phase; gait velocity 0.5 m/S. Time intervals are different between frames to present the most characteristic/descriptive subphases of the stance
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The FE mesh of the three-dimensional model versus skeletal anatomy (adapted from 57): (a) lateral view (A-A is a cross section through the center of the metatarsals) and (b) medial view
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Muscle forces that act on the foot model during the six characteristic subphases of stance (indicated by numbers 1–14 according to Table 1)
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Model validation: (a) the predicted distribution of vertical reaction forces [N] among the supports of the foot model at the six characteristic subphases of stance; (b) the predicted normalized total vertical reaction component, and (c) the predicted normalized total horizontal component in the longitudinal direction during stance versus typical measured data (adapted from Brull and Arcan 16), obtained at a gait test of a normal subject (solid line)
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Definition of the Stress Intensity Parameters (SIP) on a characteristic foot-ground CPD pattern: The highest loaded areas (1), (3) are selected to represent the heel sharpness and metatarsal head pressures respectively, while the lowest loaded area (2) is selected to represent the arch rise.
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The von Mises stress distributions in the foot model at the six characteristic subphases of stance




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