Cortical time-course of evidence accumulation during semantic processing

Gayane Ghazaryan; Marijn van Vliet; Lotta Lammi; Tiina Lindh-Knuutila; Sasa Kivisaari; Annika Hultén; Riitta Salmelin

doi:10.1038/s42003-023-05611-6

Cortical time-course of evidence accumulation during semantic processing

Gayane Ghazaryan^*, Marijn van Vliet, Lotta Lammi, Tiina Lindh-Knuutila, Sasa Kivisaari, Annika Hultén, Riitta Salmelin

^*Corresponding author for this work

Department of Neuroscience and Biomedical Engineering

Research output: Contribution to journal › Article › Scientific › peer-review

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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.

Original language	English
Article number	1242
Pages (from-to)	1-12
Number of pages	12
Journal	Communications Biology
Volume	6
Issue number	1
DOIs	https://doi.org/10.1038/s42003-023-05611-6
Publication status	Published - Dec 2023
MoE publication type	A1 Journal article-refereed

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10.1038/s42003-023-05611-6

Cortical time-course of evidence accumulation during semantic processingFinal published version, 3.68 MBLicence: CC BY

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title = "Cortical time-course of evidence accumulation during semantic processing",

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.",

author = "Gayane Ghazaryan and {van Vliet}, Marijn and Lotta Lammi and Tiina Lindh-Knuutila and Sasa Kivisaari and Annika Hult{\'e}n and Riitta Salmelin",

note = "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 Jus{\'e}lius 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 Jus{\'e}lius Foundation (to R.S.), and the Finnish Cultural Foundation (to G.G.). Publisher Copyright: {\textcopyright} 2023, The Author(s).",

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doi = "10.1038/s42003-023-05611-6",

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AU - Kivisaari, Sasa

AU - Hultén, Annika

AU - Salmelin, Riitta

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Cortical time-course of evidence accumulation during semantic processing

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Salmelin_konsortio: Aivojen, mielen ja taudin kulun toiminnallinen yksillöllisyys

Van Vliet Marijn AT-palkka: Unraveling language in the brain through biologically plausible modeling of interconnected cognitive systems

-: Individual cortical markers of language function

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Study Findings from Aalto University Advance Knowledge in Biology (Cortical time-course of evidence accumulation during semantic processing)

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Cortical time-course of evidence accumulation during semantic processing

Abstract

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Salmelin_konsortio: Aivojen, mielen ja taudin kulun toiminnallinen yksillöllisyys

Van Vliet Marijn AT-palkka: Unraveling language in the brain through biologically plausible modeling of interconnected cognitive systems

-: Individual cortical markers of language function

Equipment

Aalto Neuroimaging Infrastructure

Science-IT

Press/Media

Study Findings from Aalto University Advance Knowledge in Biology (Cortical time-course of evidence accumulation during semantic processing)

Cite this