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Decoding the information structure underlying the neural representation of concepts
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In: Proc Natl Acad Sci U S A (2022)
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Abstract:
The nature of the representational code underlying conceptual knowledge remains a major unsolved problem in cognitive neuroscience. We assessed the extent to which different representational systems contribute to the instantiation of lexical concepts in high-level, heteromodal cortical areas previously associated with semantic cognition. We found that lexical semantic information can be reliably decoded from a wide range of heteromodal cortical areas in the frontal, parietal, and temporal cortex. In most of these areas, we found a striking advantage for experience-based representational structures (i.e., encoding information about sensory-motor, affective, and other features of phenomenal experience), with little evidence for independent taxonomic or distributional organization. These results were found independently for object and event concepts. Our findings indicate that concept representations in the heteromodal cortex are based, at least in part, on experiential information. They also reveal that, in most heteromodal areas, event concepts have more heterogeneous representations (i.e., they are more easily decodable) than object concepts and that other areas beyond the traditional “semantic hubs” contribute to semantic cognition, particularly the posterior cingulate gyrus and the precuneus.
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Keyword:
Social Sciences
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URL: http://www.ncbi.nlm.nih.gov/pmc/articles/PMC8832989/ https://doi.org/10.1073/pnas.2108091119 http://www.ncbi.nlm.nih.gov/pubmed/35115397
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Deep Artificial Neural Networks Reveal a Distributed Cortical Network Encoding Propositional Sentence-Level Meaning
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In: J Neurosci (2021)
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Differential Activation of the Visual Word Form Area During Auditory Phoneme Perception in Youth with Dyslexia
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In: Neuropsychologia (2020)
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An Integrated Neural Decoder of Linguistic and Experiential Meaning
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Lesion localization of speech comprehension deficits in chronic aphasia
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The Relationship Between Maternal Education and the Neural Substrates of Phoneme Perception in Children: Interactions Between Socioeconomic Status and Proficiency Level
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Surface Errors Without Semantic Impairment in Acquired Dyslexia: A Voxel-Based Lesion-Symptom Mapping Study ...
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Heteromodal Cortical Areas Encode Sensory-Motor Features of Word Meaning
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Predicting brain activation patterns associated with individual lexical concepts based on five sensory-motor attributes
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Cerebral Localization of Impaired Phonological Retrieval During Rhyme Judgment
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Anatomy is strategy: Skilled reading differences associated with structural connectivity differences in the reading network
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FMRI of Phonemic Perception and Its Relationship to Reading Development in Elementary- to Middle-School-Age Children
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The Role of Left Occipitotemporal Cortex in Reading: Reconciling Stimulus, Task, and Lexicality Effects
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Perceptual demand modulates activation of human auditory cortex in response to task-irrelevant sounds
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The Role of Left Occipitotemporal Cortex in Reading: Reconciling Stimulus, Task, and Lexicality Effects
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