A new set of parameters for Computerised Dynamic Posturography

Abstract

The Sensory Organisation Test (SOT) of Computerised Dynamic Posturography (CDP) measures the Centre of Pressure coordinates, in order to assess upright balance function of subjects as well as the contribution of vestibular, somatosensory and visual systems. A number of subjects refer postural unbalance and have negative test. The aim of the study is to propose a new method that could improve the SOT sensitivity and increase the test’s discrimination power. Principal Component Analysis (PCA) was performed in a set of 14 posturographic parameters for the six conditions of the SOT. Fifty healthy subjects (mean age 41.26±13.57 years) were analysed. Four Principal Components (PCs) that describe about the 90% of the total variation of the postural parameters were found for each condition. The variability of posturographic parameters in normal subjects has been studied and will be extended in next works to pathological subjects.