GLOBAL OPTIMIZATION METHOD APPLIED TO THE KINEMATICS OF GAIT IN PREGNANT WOMEN

Author:

AGUIAR LILIANA1,ANDRADE CARLOS1,BRANCO MARCO2,SANTOS-ROCHA RITA12,VIEIRA FILOMENA1,VELOSO ANTÓNIO1

Affiliation:

1. Laboratory of Biomechanics and Functional Morphology, Neuromechanics Research Group of Human Movement, CIPER, Faculty of Human Kinetics, University of Lisbon, Portugal

2. Sport Sciences School of Rio Maior, Polytechnic Institute of Santarém, Portugal

Abstract

Morphological changes are associated to pregnancy, such as weight gain and increased volume of the trunk. The soft tissue artifact can also increase with these characteristics and affect the real joint kinematics. The main objective of this study was to understand the effect of using three different constraining sets in the lower limb joints, in the amount of soft tissue artifact (STA) of pregnant women, in order to obtain the most appropriated joint set to be used in gait and in this population. The ankle, knee and hip joints were modeled respectively with the following characteristics: (1) Universal–revolute–spherical (URS), (2) spherical–revolute–spherical (SRS) and (3) spherical–spherical–spherical (SSS). The six degrees of freedom (6DOF) model was used as the basis for comparison and considered the one with the highest error associated to the STA. In pregnant women, the URS model seems to affect more the kinematic variables when compared with the 6DOF model. Assuming that the kinematic error associated with pregnant women is increased due to the STA, the URS model may be affecting more the angular kinematics of the knee joint. SSS model seems to be more appropriated to analyze gait in second trimester pregnant women.

Publisher

World Scientific Pub Co Pte Lt

Subject

Biomedical Engineering

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