Sensory modality-independent activation of the brain network for language
Number of pages
SourceThe Journal of Neuroscience, 40, 14, (2020), pp. 2914-2924
Article / Letter to editor
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SW OZ DCC PL
PI Group Neurobiology of Language
PI Group Statistical Imaging Neuroscience
The Journal of Neuroscience
Subject110 000 Neurocognition of Language; 220 Statistical Imaging Neuroscience; All institutes and research themes of the Radboud University Medical Center; Psycholinguistics; Radboudumc 7: Neurodevelopmental disorders DCMN: Donders Center for Medical Neuroscience
The meaning of a sentence can be understood, whether presented in written or spoken form. Therefore it is highly probable that brain processes supporting language comprehension are at least partly independent of sensory modality. To identify where and when in the brain language processing is independent of sensory modality, we directly compared neuromagnetic brain signals of 200 human subjects (102 males) either reading or listening to sentences. We used multiset canonical correlation analysis to align individual subject data in a way that boosts those aspects of the signal that are common to all, allowing us to capture word-by-word signal variations, consistent across subjects and at a fine temporal scale. Quantifying this consistency in activation across both reading and listening tasks revealed a mostly left hemispheric cortical network. Areas showing consistent activity patterns include not only areas previously implicated in higher-level language processing, such as left prefrontal, superior & middle temporal areas and anterior temporal lobe, but also parts of the control-network as well as subcentral and more posterior temporal-parietal areas. Activity in this supramodal sentence processing network starts in temporal areas and rapidly spreads to the other regions involved. The findings do not only indicate the involvement of a large network of brain areas in supramodal language processing, but also indicate that the linguistic information contained in the unfolding sentences modulates brain activity in a word-specific manner across subjects.
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