Parieto-occipital suppression eliminates implicit bidirectionality in grapheme-colour synaesthesia

Rothen, Nicolas; Nyffeler, Thomas; von Wartburg, Roman; Müri, René; Meier, Beat (2010). Parieto-occipital suppression eliminates implicit bidirectionality in grapheme-colour synaesthesia. Neuropsychologia, 48(12), pp. 3482-7. Oxford: Elsevier 10.1016/j.neuropsychologia.2010.07.032

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Synaesthesia is a condition in which the input of one sensory modality triggers extraordinary additional experiences. On an explicit level, subjects affected by this condition normally report unidirectional experiences. In grapheme-colour synaesthesia for example, the letter A printed in black may trigger a red colour experience but not vice versa. However on an implicit level, at least for some types of synaesthesia, bidirectional activation is possible. In this study we tested whether bidirectional implicit activation is mediated by the same brain areas as explicit synaesthetic experiences. Specifically, we demonstrated suppression of implicit bidirectional activation with the application of transcranial magnetic stimulation over parieto-occipital brain areas. Our findings indicate that parieto-occipital regions are not only involved in explicit but also implicit synaesthetic binding.

Item Type:

Journal Article (Original Article)


04 Faculty of Medicine > Department of Head Organs and Neurology (DKNS) > Clinic of Neurology
07 Faculty of Human Sciences > Institute of Psychology > Psychological and Behavioral Health

UniBE Contributor:

Nyffeler, Thomas; Müri, René Martin and Meier, Beat








Factscience Import

Date Deposited:

04 Oct 2013 14:08

Last Modified:

26 Apr 2017 02:25

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URI: (FactScience: 197883)

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