Semantic representations in the visual cortex of blind and sighted humans
Αποθηκεύτηκε σε:
| Εκδόθηκε σε: | bioRxiv (Jan 30, 2025) |
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| Κύριος συγγραφέας: | |
| Άλλοι συγγραφείς: | , , |
| Έκδοση: |
Cold Spring Harbor Laboratory Press
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| Διαθέσιμο Online: | Citation/Abstract Full Text - PDF Full text outside of ProQuest |
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| 001 | 3161603155 | ||
| 003 | UK-CbPIL | ||
| 022 | |a 2692-8205 | ||
| 024 | 7 | |a 10.1101/2025.01.28.635293 |2 doi | |
| 035 | |a 3161603155 | ||
| 045 | 0 | |b d20250130 | |
| 100 | 1 | |a Paczyńska, Małgorzata | |
| 245 | 1 | |a Semantic representations in the visual cortex of blind and sighted humans | |
| 260 | |b Cold Spring Harbor Laboratory Press |c Jan 30, 2025 | ||
| 513 | |a Working Paper | ||
| 520 | 3 | |a In blind humans, the “visual” cortex responds to linguistic stimuli, such as words and sentences. This is sometimes taken as evidence that this brain region supports starkly different computations in blind and sighted individuals. Here, we challenge this view and show that, during word processing, the visual areas in these two populations represent the same semantic dimension – the knowledge about physical properties of word referents. Using analysis of fMRI activation patterns, we found that the visual cortex in both blind and sighted participants represented differences between individual words. In both groups, the activation patterns for words in the visual cortex reflected physical, but not conceptual similarity between word referents. Furthermore, the between-group correlations in these activation patterns were comparable to within-group correlations. Finally, during word processing, the visual areas in both groups showed greatest “representational connectivity” to the occipitotemporal areas. Overall, our findings suggest that responses to linguistic stimuli in the visual cortex of blind individuals are driven by representational mechanisms that are functional also in the sighted adult brain. In sighted individuals, information about physical properties of word referents might be backprojected to visual areas, from the occipitotemporal cortex, to support visual predictions, imagery, and visuospatial thinking. In blind individuals, this mechanism might be preserved and, combined with increased excitability of the blind visual cortex, drives strong responses of this region to linguistic stimuli.Competing Interest StatementThe authors have declared no competing interest. | |
| 653 | |a Mental task performance | ||
| 653 | |a Excitability | ||
| 653 | |a Visual cortex | ||
| 653 | |a Linguistics | ||
| 653 | |a Information processing | ||
| 653 | |a Functional magnetic resonance imaging | ||
| 653 | |a Visual stimuli | ||
| 653 | |a Word processing | ||
| 653 | |a Physical properties | ||
| 653 | |a Visual system | ||
| 653 | |a Neural networks | ||
| 653 | |a Semantics | ||
| 700 | 1 | |a Urbaniak, Marta | |
| 700 | 1 | |a Dębecka, Marta | |
| 700 | 1 | |a Bola, Łukasz | |
| 773 | 0 | |t bioRxiv |g (Jan 30, 2025) | |
| 786 | 0 | |d ProQuest |t Biological Science Database | |
| 856 | 4 | 1 | |3 Citation/Abstract |u https://www.proquest.com/docview/3161603155/abstract/embedded/6A8EOT78XXH2IG52?source=fedsrch |
| 856 | 4 | 0 | |3 Full Text - PDF |u https://www.proquest.com/docview/3161603155/fulltextPDF/embedded/6A8EOT78XXH2IG52?source=fedsrch |
| 856 | 4 | 0 | |3 Full text outside of ProQuest |u https://www.biorxiv.org/content/10.1101/2025.01.28.635293v1 |