Article

The estimation of the trajectory of the centre of pressure during gait is
possible without using force plate by modelling the whole body as a multi-segment
chain. The kinematics and inertial parameters of each segment are necessary to
determine the ground reaction forces and moments. The position of the centre of
pressure can then be calculated at each frame of time. The objective of the study
was to evaluate the accuracy of the estimation of the position of the centre of
pressure during gait obtained without force plate data. Segment inertial
parameters were determined using a proportional model and a geometric model. The
modelling and calculations were computed for six volunteers and the estimated
centres of pressure were compared to the centre of pressure measured using force
plates considered as the gold standard. The estimation was better using the
geometric model with an accuracy of 33 mm (4.1% of the peak-to-peak amplitude) on
the longitudinal axis and 14.2 mm (12.9% of the peak-to-peak amplitude) on the
lateral axis.
CI - Copyright 2009 Elsevier B.V. All rights reserved.

Langue : ANGLAIS