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Grapheme-color and tone-color synesthesia is associated with structural brain changes in visual regions implicated in color, form, and motion

journal contribution
posted on 2023-06-07, 17:48 authored by Michael J Banissy, Lauren Stewart, Neil G Muggleton, Timothy D Griffiths, Vincent Y Walsh, Jamie WardJamie Ward, Ryota Kanai
Synesthesia is a rare condition in which stimulation in one modality leads to a secondary experience in another sensory modality. Varying accounts attribute the condition to either neuroanatomical differences between the synesthetes and non-synesthetes or functional differences in how sensory brain regions interact. This study employed voxel-based morphometry to examine whether synesthetes who experience both grapheme-color and tone-color synesthesia as their evoked sensation show neuroanatomical differences in gray matter volume compared to non-synesthetes. We observed that synesthetes showed an increase in gray matter volume in left posterior fusiform gyrus (FG), but a concomitant decrease in anterior regions of left FG and left MT/V5. These findings imply that synesthesia for color is linked to neuroanatomical changes between adjacent regions of the visual system

History

Publication status

  • Published

Journal

Cognitive Neuroscience

ISSN

1758-8928

Publisher

Taylor & Francis

Issue

1

Volume

3

Page range

29-35

Department affiliated with

  • Psychology Publications

Full text available

  • No

Peer reviewed?

  • Yes

Legacy Posted Date

2013-01-29

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