[Analysis of the interaction between visual and vestibular influence in postural control]

Postural control depends on a coordinate function of the visual, somatosensory and vestibular systems. A correct analysis of each of them is necessary, in order to obtain an adequate postural evaluation.

A normal and a pathological vestibular group of subjects are study. A dynamometric platform studied was performed for every subject in both groups. A scalogram, the centre of pressure variation velocity, and the area, were the parameters analyzed.

In both groups, parameters showed higher values when propioceptive and visual system were altered. A pattern of visual dependence was identified in both groups. The scalogram in the normal group showed a minimal centre of pressure variation. In contrast, the pathological group showed a major variation, with differences depending on the compensation status.

Our study protocol with posturography is an adequate instrument of postural evaluation, which discriminates the visual dependence and aids to evaluate the compensation.