Article

In auditory-visual synaesthesia, all kinds of sound can induce additional visual
experiences. To identify the brain regions mainly involved in this form of
synaesthesia, functional magnetic resonance imaging (fMRI) has been used during
non-linguistic sound perception (chords and pure tones) in synaesthetes and
non-synaesthetes. Synaesthetes showed increased activation in the left inferior
parietal cortex (IPC), an area involved in multimodal integration, feature
binding and attention guidance. No significant group-differences could be
detected in area V4, which is known to be related to colour vision and form
processing. The results support the idea of the parietal cortex acting as sensory
nexus area in auditory-visual synaesthesia, and as a common neural correlate for
different types of synaesthesia.
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Langue : ANGLAIS