From shape to meaning: Evidence for multiple fast feedforward hierarchies of concept processing in the human brain
| Autor: | Judy Kim, Patrick S. Malone, Maximilian Riesenhuber, Jacob G. Martin, Srikanth Damera, Laurie S. Glezer, Clara A. Scholl |
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| Rok vydání: | 2020 |
| Předmět: |
Adult
Male Computer science Cognitive Neuroscience Concept Formation Sensory system Electroencephalography 050105 experimental psychology lcsh:RC321-571 03 medical and health sciences Young Adult 0302 clinical medicine Parietal Lobe medicine Humans 0501 psychology and cognitive sciences lcsh:Neurosciences. Biological psychiatry. Neuropsychiatry Brain Mapping medicine.diagnostic_test Concept Processing 05 social sciences Feed forward Representation (systemics) Association Learning Inferior parietal lobule Human brain Temporal Lobe medicine.anatomical_structure Neurology Pattern Recognition Visual Female Neuroscience 030217 neurology & neurosurgery Meaning (linguistics) |
| Zdroj: | NeuroImage, Vol 221, Iss, Pp 117148-(2020) |
| ISSN: | 1095-9572 |
| Popis: | A number of fMRI studies have provided support for the existence of multiple concept representations in areas of the brain such as the anterior temporal lobe (ATL) and inferior parietal lobule (IPL). However, the interaction among different conceptual representations remains unclear. To better understand the dynamics of how the brain extracts meaning from sensory stimuli, we conducted a human high-density electroencephalography (EEG) study in which we first trained participants to associate pseudowords with various animal and tool concepts. After training, multivariate pattern classification of EEG signals in sensor and source space revealed the representation of both animal and tool concepts in the left ATL and tool concepts within the left IPL within 250 ms. Finally, we used Granger Causality analyses to show that orthography-selective sensors directly modulated activity in the parietal-tool selective cluster. Together, our results provide evidence for distinct but parallel “perceptual-to-conceptual” feedforward hierarchies in the brain. |
| Databáze: | OpenAIRE |
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