A shared neural substrate for action verbs and observed actions in human posterior parietal cortex
| Autor: | Guy Orban, Tyson Aflalo, Richard A. Andersen, Nader Pouratian, Emily R. Rosario, Carey Y. Zhang |
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| Jazyk: | angličtina |
| Rok vydání: | 2020 |
| Předmět: |
genetic structures
Neural substrate Cognitive Neuroscience Neurophysiology Posterior parietal cortex Sensory system ORGANIZATION 050105 experimental psychology MECHANISMS 03 medical and health sciences 0302 clinical medicine Parietal Lobe CATEGORIZATION Humans 0501 psychology and cognitive sciences Visual experience BRAIN NEURONS Research Articles Language 030304 developmental biology Brain Mapping 0303 health sciences Multidisciplinary Science & Technology 05 social sciences Motor Cortex SciAdv r-articles Magnetic Resonance Imaging REPRESENTATIONS Multidisciplinary Sciences Science & Technology - Other Topics Multiple view Psychology MOTOR Neuroscience 030217 neurology & neurosurgery Research Article Mental image |
| Zdroj: | Science Advances |
| Popis: | A shared neural substrate for action verbs and visually observed actions suggests sensory-motor contributions to language meaning. High-level sensory and motor cortical areas are activated when processing the meaning of language, but it is unknown whether, and how, words share a neural substrate with corresponding sensorimotor representations. We recorded from single neurons in human posterior parietal cortex (PPC) while participants viewed action verbs and corresponding action videos from multiple views. We find that PPC neurons exhibit a common neural substrate for action verbs and observed actions. Further, videos were encoded with mixtures of invariant and idiosyncratic responses across views. Action verbs elicited selective responses from a fraction of these invariant and idiosyncratic neurons, without preference, thus associating with a statistical sampling of the diverse sensory representations related to the corresponding action concept. Controls indicated that the results are not the product of visual imagery or arbitrary learned associations. Our results suggest that language may activate the consolidated visual experience of the reader. |
| Databáze: | OpenAIRE |
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