Campus Units

Kinesiology

Document Type

Article

Publication Version

Published Version

Publication Date

5-8-2014

Journal or Book Title

Journal of Visualized Experiments

Volume

87

First Page

e50977

DOI

10.3791/50977

Abstract

The purpose of this study was two-fold: 1) demonstrate a technique that can be used to directly estimate the inertial properties of a below-knee prosthesis, and 2) contrast the effects of the proposed technique and that of using intact limb inertial properties on joint kinetic estimates during walking in unilateral, transtibial amputees. An oscillation and reaction board system was validated and shown to be reliable when measuring inertial properties of known geometrical solids. When direct measurements of inertial properties of the prosthesis were used in inverse dynamics modeling of the lower extremity compared with inertial estimates based on an intact shank and foot, joint kinetics at the hip and knee were significantly lower during the swing phase of walking. Differences in joint kinetics during stance, however, were smaller than those observed during swing. Therefore, researchers focusing on the swing phase of walking should consider the impact of prosthesis inertia property estimates on study outcomes. For stance, either one of the two inertial models investigated in our study would likely lead to similar outcomes with an inverse dynamics assessment.

Comments

This article is from Journal of Visualized Experiments, 87(2014); e50977, doi: 10.3791/50977. Posted with permission.

Rights

2014 Creative Commons Attribution-Noncommercial-NoDerivs 3.0 Unported License

Language

en

File Format

application/pdf

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