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Effect of inaccuracies in anthropometric data and linked-segment inverse dynamic modeling on kinetics of gait in persons with partial foot amputation

Michael P. Dillon, BPO(Hons), PhD, et al.

Figure. Geometric model of a metatarsophalangeal residuum.

Previous investigations of walking in people with partial foot amputation (PFA) likely underestimated the work required of the hip extensor and knee flexor muscles, particularly during swing phase, by not accurately modeling the residual foot and prosthetic replacement. In this investigation, we sought to understand how much the errors in the models influenced our understanding of the walking patterns of people with PFA. To do this, we developed customized models that more accurately represented the residual foot, prosthesis, and footwear. The results indicate that conventional models accurately describe the gait of people with PFA during stance phase but underestimate the work required of the knee flexor and hip extensor muscles during swing phase.

Volume 45 Number 9, 2008
   Pages 1303 — 1316

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