Visual pathway deficit in dyslexia: VEPs testing

Abstrakt

The monograph mentions a short survey of contemporary most important hypotheses of dyslexia etiology: phonological hypothesis, automaticity/cerebellar hypothesis, temporal processing hypothesis and visual pathway dysfunction hypothesis. The magnocellular visual pathway deficit theory is treated in more detail and it is accompanied by presentation of studies from our laboratory, which use visual evoked potentials (VEPs) for verification of this hypothesis.

These studies provide an evidence of selective dysfunction of visual magnocellular pathway and/or dorsal cortical stream and their slower maturation in some of the tested dyslexic children, which confirms the visual magnocellular hypothesis in at least a part of dyslexia cases.