Article

Kinematic multi-segment foot models are still evolving, but have seen increased
use in clinical and research settings. The addition of kinetics may increase
knowledge of foot and ankle function as well as influence multi-segment foot
model evolution; however, previous kinetic models are too complex for clinical
use. In this study we present a three-segment kinetic foot model and thorough
evaluation of model performance during normal gait. In this first of two
companion papers, model reference frames and joint centers are analyzed for
repeatability, joint translations are measured, segment rigidity characterized,
and sample joint angles presented. Within-tester and between-tester repeatability
were first assessed using 10 healthy pediatric participants, while kinematic
parameters were subsequently measured on 17 additional healthy pediatric
participants. Repeatability errors were generally low for all sagittal plane
measures as well as transverse plane Hindfoot and Forefoot segments (median<3
degrees ), while the least repeatable orientations were the Hindfoot coronal
plane and Hallux transverse plane. Joint translations were generally less than
2mm in any one direction, while segment rigidity analysis suggested rigid body
behavior for the Shank and Hindfoot, with the Forefoot violating the rigid body
assumptions in terminal stance/pre-swing. Joint excursions were consistent with
previously published studies.
CI - Copyright (c) 2012 Elsevier B.V. All rights reserved.

Langue : ANGLAIS