Spatial and temporal analysis of postural control in dyslexic children

Abstract

Objective: The aim of this study is to examine postural control of dyslexic children using both spatial and temporal analysis.

Methods: Thirty dyslexic (mean age 9.7±0.3years) and thirty non-dyslexic age-matched children participated in the study. Postural stability was evaluated using Multitest Equilibre from Framiral®. Posture was recorded in the following conditions: eyes open fixating a target (EO) and eyes closed (EC) on stable (-S-) and unstable (-U-) platforms.

Results: The findings of this study showed poor postural stability in dyslexic children with respect to the non-dyslexic children group, as demonstrated by both spatial and temporal analysis. In both groups of children postural control depends on the condition, and improves when the eyes are open on a stable platform. Dyslexic children have spectral power indices that are higher than in non-dyslexic children and they showed a shorter cancelling time.

Conclusion: Poor postural control in dyslexic children could be due to a deficit in using sensory information most likely caused by impairment in cerebellar activity.

Significance: The reliability of brain activation patterns, namely in using sensory input and cerebellar activity may explain the deficit in postural control in dyslexic children.

Keywords: Cerebellum; Children; Dyslexia; Postural control; Sensorial strategy; Wavelet transformation.