A recent functional magnetic resonance imaging (fMRI) study concluded
that the motion-specific visual area V5 is not activated in dyslexic s
ubjects. We report here opposing evidence based on whole-scalp neuroma
gnetic recordings. Apparent-motion stimuli elicited similar activation
of V5 in both dyslexic and control subjects, with a trend for longer
latencies in dyslexics. Both high- and low-contrast stimuli activated
the V5 region in dyslexics. The lack of significant blood flow changes
despite modified neuronal synchrony would explain the absence of fMRI
signals and the presence of neuromagnetic signals in dyslexic subject
s.