Cortical time-course of evidence accumulation during semantic processing

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Volume Title
A1 Alkuperäisartikkeli tieteellisessä aikakauslehdessä
Date
2023-12
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Language
en
Pages
12
1-12
Series
Communications Biology, Volume 6, issue 1
Abstract
Our understanding of the surrounding world and communication with other people are tied to mental representations of concepts. In order for the brain to recognize an object, it must determine which concept to access based on information available from sensory inputs. In this study, we combine magnetoencephalography and machine learning to investigate how concepts are represented and accessed in the brain over time. Using brain responses from a silent picture naming task, we track the dynamics of visual and semantic information processing, and show that the brain gradually accumulates information on different levels before eventually reaching a plateau. The timing of this plateau point varies across individuals and feature models, indicating notable temporal variation in visual object recognition and semantic processing.
Description
Funding Information: We would like to thank Jenna Kanerva and Filip Ginter at the University of Turku for development of the Finnish language word2vec model. We also thank Ali Faisal for assistance in the early stages of the project and Anni Nora for helpful comments on a draft. Computational resources were provided by the Aalto Science-IT project. This research was funded by the Research Council of Finland (#315553 and #355407 to R.S., #310988 and #343385 to M.v.V., #286070 to S.K., #287474 to A.H.), the Sigrid Jusélius Foundation (to R.S.), and the Finnish Cultural Foundation (to G.G.). Funding Information: We would like to thank Jenna Kanerva and Filip Ginter at the University of Turku for development of the Finnish language word2vec model. We also thank Ali Faisal for assistance in the early stages of the project and Anni Nora for helpful comments on a draft. Computational resources were provided by the Aalto Science-IT project. This research was funded by the Research Council of Finland (#315553 and #355407 to R.S., #310988 and #343385 to M.v.V., #286070 to S.K., #287474 to A.H.), the Sigrid Jusélius Foundation (to R.S.), and the Finnish Cultural Foundation (to G.G.). Publisher Copyright: © 2023, The Author(s).
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Citation
Ghazaryan , G , van Vliet , M , Lammi , L , Lindh-Knuutila , T , Kivisaari , S , Hultén , A & Salmelin , R 2023 , ' Cortical time-course of evidence accumulation during semantic processing ' , Communications Biology , vol. 6 , no. 1 , 1242 , pp. 1-12 . https://doi.org/10.1038/s42003-023-05611-6