Automatic Processing of Numerosity in Human Neocortex Evidenced by Occipital and Parietal Neuromagnetic Responses
| Autor: | Amandine Van Rinsveld, Vincent Wens, Mathieu Guillaume, Anthony Beuel, Wim Gevers, Xavier De Tiège, Alain Content |
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| Rok vydání: | 2021 |
| Předmět: |
magnetoencephalography
genetic structures media_common.quotation_subject Posterior parietal cortex Visual system Psychologie du développement cognitif 050105 experimental psychology 03 medical and health sciences 0302 clinical medicine frequency-tagging Perception medicine 0501 psychology and cognitive sciences Set (psychology) Visual hierarchy Imagerie cérébrale fonctionnelle General Environmental Science media_common numerosity Neocortex medicine.diagnostic_test 05 social sciences Neurosciences cognitives Psychologie expérimentale Numerosity adaptation effect Magnetoencephalography approximate number sense medicine.anatomical_structure Psycholinguistique General Earth and Planetary Sciences Original Article Psychology Psychologie cognitive Sciences cognitives Neuroscience 030217 neurology & neurosurgery |
| Zdroj: | Cerebral cortex communications, 2 (2 Cerebral Cortex Communications |
| ISSN: | 2632-7376 |
| Popis: | Humans and other animal species are endowed with the ability to sense, represent, and mentally manipulate the number of items in a set without needing to count them. One central hypothesis is that this ability relies on an automated functional system dedicated to numerosity, the perception of the discrete numerical magnitude of a set of items. This system has classically been associated with intraparietal regions, however accumulating evidence in favor of an early visual number sense calls into question the functional role of parietal regions in numerosity processing. Targeting specifically numerosity among other visual features in the earliest stages of processing requires high temporal and spatial resolution. We used frequency-tagged magnetoencephalography to investigate the early automatic processing of numerical magnitudes and measured the steady-state brain responses specifically evoked by numerical and other visual changes in the visual scene. The neuromagnetic responses showed implicit discrimination of numerosity, total occupied area, and convex hull. The source reconstruction corresponding to the implicit discrimination responses showed common and separate sources along the ventral and dorsal visual pathways. Occipital sources attested the perceptual salience of numerosity similarly to both other implicitly discriminable visual features. Crucially, we found parietal responses uniquely associated with numerosity discrimination, showing automatic processing of numerosity in the parietal cortex, even when not relevant to the task. Taken together, these results provide further insights into the functional roles of parietal and occipital regions in numerosity encoding along the visual hierarchy. info:eu-repo/semantics/published |
| Databáze: | OpenAIRE |
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