Valentina Niccolai, Edmund Wascher and Petra Stoerig Distinct neural processes in grapheme–colour synaesthetes and semantic controls European Journal of Neuroscience 36
Article first published online: 28 AUG 2012 | DOI: 10.1111/j.1460-9568.2012.08270.x
Whereas synaesthetes show congruency modulation of the N170 component, controls do not. This suggests that early sensory processing distinguishes crossmodal synaesthetic from acquired associations. Both early- and late-stage cognitive components are involved in bidirectional synaesthesia. Similar binding mechanisms appear therefore to subtend the processing of opposite flow directions of information (grapheme-colour, colour-grapheme).
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