sentence: In fact , evidence for the parietal cortices key role in synesthetic perception comes from several neuroimaging studies with groups of grapheme-color synesthetes ( Rouw and Scholte , 2010 ; Van Leeuwen et al ., 2010 ; Sinke et al ., 2012a ) , spatial sequence synesthetes ( Tang et al ., 2008 ) and auditory-visual synesthetes ( Neufeld et al ., 2012a ) .