عنوان مقاله [English]
The purpose of this study was to investigate the effect of sensory systems interference in dual task condition on blind and sighted person’s balance.Total24, (12 blind &12sighted) subjects participate in this study. Per subject performed balance task blocks with and without performing a cognitive auditory-memory attention task (3 blocks in quiet standing condition & 3 blocks in applying auditory memory task condition). In addition in per block one of sensory systems was manipulation (without interference, vestibular interference and proprioception interference). Therefore per subjects performed 6balance blocks .This study finding show that the ability to control static balance was inferior in blind than sighted persons. There was no significant difference between simple quiet standing and dual task in blind persons (p=0.90).but this difference was significant in sighted persons and performance in simple quiet standing was better than dual task (p=0.002). main difference between two groups was in vestibular interference condition(p=0.001) and in this condition sighted persons was better than blind persons .furthermore finding confirm that balance mechanism between blind and sighted persons is different.