The Comparison of Postural Control Ability in Children with/without Dyslexia

In some reviewed studies on children with dyslexia it is observed that there is a significant relationship between the ability of postural control and dyslexia. In this study، by controlling the interfering factors، we have reviewed this relation by comparing postural control and balance ability in normal children and children with dyslexia. This case – control study is done on 19 boys with dyslexia by mean age of (112. 90± 13. 78) and 19 Normal boys with mean age of (118. 42 ± 15. 62). Normal children and children with dyslexia were matched in age، height and weight. Positioning duties included standing with adjacent feet on firm surface with open and close eyes، and with close eyes on the foam and with internal perturbation on firm surface. Duration of each assignment was 35 seconds and the force plate device was used to evaluate the condition performance. Part balances of Bruininks Oseretsky test were take from all of the samples and correlation between functional and laboratory test were reviewed. The results showed that the area on firm surface with open eyes، internal perturbation dependency rate in the standard deviations of the lateral body sways (SDX) and of the antero-posterior body sways (SDY) and the surface area، there is significant difference between normal children and children with dyslexia، but it''s not found significant difference between the two groups in path length and mean velocity in different postural control modes (foam، firm surface، open and close eyes) and visual dependence in all parameters (path length، velocity and surface area). It is not also found significant correlation between Center of pressure (COP) with the balance part of Bruininks Oseretsky test in children with dyslexia. In spite of differences in some postural control parameters between normal children and children with dyslexia، it was not found significant relationship between postural control and dyslexia. Key words: Control Posture / Dyslexia