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Task modulates the orthographic and phonological representations in the bilateral ventral Occipitotemporal cortex

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Abstract

As a key area in word reading, the left ventral occipitotemporal cortex is proposed for abstract orthographic processing, and its middle part has even been labeled as the visual word form area. Because the definition of the VWFA largely varies and the reading task differs across studies, the function of the left ventral occipitotemporal cortex in word reading is continuingly debated on whether this region is specific for orthographic processing or be involved in an interactive framework. By using representational similarity analysis (RSA), this study examined information representation in the VWFA at the individual level and the modulatory effect of reading task. Twenty-four subjects were scanned while performing the explicit (i.e., the naming task) and implicit (i.e., the perceptual task) reading tasks. Activation analysis showed that the naming task elicited greater activation in regions related to phonological processing (e.g., the bilateral prefrontal cortex and temporoparietal cortex), while the perceptual task recruited greater activation in visual cortex and default mode network (e.g., the bilateral middle frontal gyrus, angular gyrus, and the right middle temporal gyrus). More importantly, RSA also showed that task modulated information representation in the bilateral anterior occipitotemporal cortex and VWFA. Specifically, ROI-based RSA revealed enhanced orthographic and phonological representations in the bilateral anterior fusiform cortex and VWFA in the naming task relative to the perceptual task. These results suggest that lexical representation in the VWFA is influenced by the demand of phonological processing, which supports the interactive account of the VWFA.

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Funding

This study was supported by grants from the National Natural Science Foundation of China [31970983 and 31771199], the Guangdong Basic and Applied Basic Research Foundation [2019A1515011027], and the Foundation for Innovation Teams in Guangdong Higher Education [2017WCXTD002].

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Authors

Contributions

JQ: Software, Formal analysis, Data curation, Writing-Original draft preparation, Visualization, Writing-Reviewing and Editing; PY: Data Curation and Writing-Original Draft; XL, YC, CH: Writing-Reviewing and Editing; LM: Conceptualization, Methodology, Writing-Original draft preparation, Writing-Reviewing and Editing, Supervision, and Funding acquisition.

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Correspondence to Leilei Mei.

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The current study was approved by the Institutional Review Boards of School of Psychology at South China Normal University. And the informed consent was obtained from all individual participants included in this study.

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All authors declare that they have no conflict of interest.

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Qu, J., Pang, Y., Liu, X. et al. Task modulates the orthographic and phonological representations in the bilateral ventral Occipitotemporal cortex. Brain Imaging and Behavior 16, 1695–1707 (2022). https://doi.org/10.1007/s11682-022-00641-w

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  • DOI: https://doi.org/10.1007/s11682-022-00641-w

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