Author/Editor		Brecelj, J; Štrucl, M; Raič, V
Title		Do visual neurophysiological tests reflect magnocellular deficit in dyslexic children?
Type		članek
Source		Pflugers Arch
Vol. and No.		Letnik 431, št. 6 Suppl 2
Publication year		1996
Volume		str. R299-300
Language		eng
Abstract		To address the question of a possible magnocellular visual deficit in children with reading problems (dyslexia), we examined pattern ERG and VEP responses to stimulation with checks of 24', 49' and 180' in size and of 5%, 42% and 100% contrast level. Neurophysiological difference between children with reading problems and those without them was found confined to VEP which showed a significant prolongation of P100 wave in dyslexic children at highest contrast (100%) and smallest checks (24'). Pattern ERG was normal. These results support the assumption of a visual deficit in dyslexic children. However, they are not consistent with an isolated deficit of the magnocellular function, which, theoretically, would cause VEP changes to lower contrast and largest check stimuli.
Descriptors		DYSLEXIA ELECTRORETINOGRAPHY EVOKED POTENTIALS, VISUAL CHILD