Analysis of postural reference points using Kinect sensor and Wii Balance Board

ALEJANDRO RODRIGO; NATALIA LÓPEZ; FERNANDO MUÑOZ; ELISA PEREZ; EMANUEL TELLO

Praga

Congreso; World Congress on Medical Physics &Biomedical Engineering; 2018

International Federation of Medical and Biological Engineering

The mechanisms of equilibrium and stability are multisystemic processes, and they have a great impact in the activities of each person´s daily life. There are not accurate evaluations that show the functional deficits caused by pathologies affecting these mechanisms. For this reason, from the areas of bioengineering and kinesiology it is proposed to carry out a quantitative analysis of the trunk movements and of the weight transfer to the lower limbs. In this work we used the Wii Balance Board and the Kinect sensor, considering the reference points such as the center of gravity (COG), represented by a point that projects the skeleton of the Kinect sensor on the column, and the Center of Pressure (COP) projected by the Wii Balance Board. The data were processed by the MATLAB platform.The experiment was performed in 10 healthy subjects without equilibrium disorders with an average age of 25 years. The proposed protocol consisted of precession movements taken simultaneously with the user placed in the area of sensing of both devices. The measurement parameters registered were the length and maximum amplitude of the trajectory draw by the user, and the velocity of the oscillations. The results showed a significant correlation between the Wii Balance Board and the Kinect Sensor curves, for all the variables calculated. We can conclude that is possible to compare and interchange the results of COG and COP, obtaining equivalent parameters in the Anteroposterior and lateromedial planes. New experiments with more patients are necessary for an assertive conclusion about clinical use of both devices.