Seeing speech: The cerebral substrate of tickertape synesthesia

We report the first functional MRI study of a tickertape synesthete. These synesthetes were described by Galton as "persons [who] see mentally in print every word that is uttered and they read them off usually as from a long imaginary strip of paper". Our synesthete and 35 other non-synesthetes controls were presented different auditory stimuli. We performed univariate and multivariate analysis, as dynamic causal modelling for the synesthete.