
The study involved investigating dyslexic children's postural control responses when visual and somatosensory cues were separately manipulated. Twenty dyslexic and 19 nondyslexic children performed a trial by standing upright inside a moving room and another by lightly touching a moving bar. Both trials lasted 240 s with the following three different stimulus characteristics: low (pretransition), high (transition), and low amplitude (posttransition). Body sway magnitude and the relationship between the movement of the room/bar surface and body sway were examined. When compared to nondyslexic children, dyslexic children oscillated with higher magnitude in the transition and posttransition under visual and somatosensory manipulation; their sway was more influenced by visual manipulation in the transition and posttransition, and they used higher applied force levels in the somatosensory modality in all conditions. The results suggest that dyslexic children could not efficiently reweight visual cues when compared to nondyslexic children. The same was not observed in the somatosensory cues when dyslexic children reduced the influence of the somatosensory stimulus. The proper use of somatosensory information was related to stronger acquired cues and higher applied forces as observed for dyslexic children. Dyslexic children experience difficulties in dynamically reweighting sensory cues although these types of difficulties are overcome when more informative sensory cues are provided.
Male, Movement, [SCCO.NEUR] Cognitive science/Neuroscience, 150, Sensation, somatosensory, Dyslexia, dyslexia, Humans, visual, Female, Cues, Child, Postural Balance, posture, Psychomotor Performance
Male, Movement, [SCCO.NEUR] Cognitive science/Neuroscience, 150, Sensation, somatosensory, Dyslexia, dyslexia, Humans, visual, Female, Cues, Child, Postural Balance, posture, Psychomotor Performance
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