الفهرس 
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Abstract
Dyslexia is a neurodevelopmental disorder characterized by a pattern of reading that is below expected for overall intelligence despite appropriate training and instruction. The magnocellular dorsal deficit theory is one of the widely accepted theories of dyslexia.
Aim: to examine the effect of a visual perceptual training program that targets the magnocellular dorsal stream on the ERPs of dyslexic children and the relation of this effect to reading skills.
Methods: this intervention study was conducted in the child psychiatry unit of the special needs care center, affiliated to the Faculty of Postgraduate Childhood Studies, Ain Shams University. The study sample consisted of seven children, 4 males and 3 females, 10 to 11.5 years old, diagnosed as visual or mixed dyslexia. Cases were subjected to reading assessment using the modified Arabic Dyslexia screening test and ERP recording using RDK before and after 12 sessions of visual perceptual training.
Results: the study results showed a significant right shift of lateralization of N2 component in response to coherent motion after intervention. This lateralization shift was correlated to improvement in reading speed and rapid automatized naming.
Conclusion: the studied visual perceptual training program is effective in improving reading and related skills, in visual and mixed dyslexia. At the same time, it shifts neuronal activity in response to coherent motion from left temporoparietal and occipital regions to the right temporoparietal region, modulating the cortical activity pattern in dyslexic children to become similar to the known pattern of normal readers.