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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 KanaiSynesthesia 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
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Publication status
- Published
Journal
Cognitive NeuroscienceISSN
1758-8928Publisher
Taylor & FrancisExternal DOI
Issue
1Volume
3Page range
29-35Department affiliated with
- Psychology Publications
Full text available
- No
Peer reviewed?
- Yes
Legacy Posted Date
2013-01-29Usage metrics
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