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  Word contexts enhance the neural representation of individual letters in early visual cortex

Heilbron, M., Richter, D., Ekman, M., Hagoort, P., & De Lange, F. P. (2020). Word contexts enhance the neural representation of individual letters in early visual cortex. Nature Communications, 11: 321. doi:10.1038/s41467-019-13996-4.

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Datensatz-Permalink: https://hdl.handle.net/21.11116/0000-0005-C5F6-7 Versions-Permalink: https://hdl.handle.net/21.11116/0000-0005-C5FF-E
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Open Access This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made. The images or other third party material in this article are included in the article’s Creative Commons license, unless indicated otherwise in a credit line to the material. If material is not included in the article’s Creative Commons license and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this license, visit http://creativecommons.org/ licenses/by/4.0/.
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Heilbron, Micha1, 2, Autor           
Richter, David1, Autor
Ekman, Matthias1, Autor
Hagoort, Peter2, Autor           
De Lange, Floris P.1, Autor
Affiliations:
1Donders Institute for Brain, Cognition and Behaviour, External Organizations, ou_55236              
2Neurobiology of Language Department, MPI for Psycholinguistics, Max Planck Society, ou_792551              

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 Zusammenfassung: Visual context facilitates perception, but how this is neurally implemented remains unclear. One example of contextual facilitation is found in reading, where letters are more easily identified when embedded in a word. Bottom-up models explain this word advantage as a post-perceptual decision bias, while top-down models propose that word contexts enhance perception itself. Here, we arbitrate between these accounts by presenting words and nonwords and probing the representational fidelity of individual letters using functional magnetic resonance imaging. In line with top-down models, we find that word contexts enhance letter representations in early visual cortex. Moreover, we observe increased coupling between letter information in visual cortex and brain activity in key areas of the reading network, suggesting these areas may be the source of the enhancement. Our results provide evidence for top-down representational enhancement in word recognition, demonstrating that word contexts can modulate perceptual processing already at the earliest visual regions.

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Sprache(n): eng - English
 Datum: 2020-01-16
 Publikationsstatus: Online veröffentlicht
 Seiten: -
 Ort, Verlag, Ausgabe: -
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 Art der Begutachtung: Expertenbegutachtung
 Identifikatoren: DOI: 10.1038/s41467-019-13996-4
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Titel: Nature Communications
  Kurztitel : Nat. Commun.
Genre der Quelle: Zeitschrift
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Ort, Verlag, Ausgabe: London : Nature Publishing Group
Seiten: - Band / Heft: 11 Artikelnummer: 321 Start- / Endseite: - Identifikator: ISSN: 2041-1723
CoNE: https://pure.mpg.de/cone/journals/resource/2041-1723