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Neural correlates of emotion-attention interactions: from perception, learning, and memory to social cognition, individual differences, and training interventions
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Second-language proficiency modulates the brain language control network in bilingual translators: An event-related fMRI study
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Language Control and Lexical Competition in Bilinguals: An Event-Related fMRI Study
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Opposite ERP effects for conscious and unconscious semantic processing under continuous flash suppression
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Semantic relatedness and first-second language effects in the bilingual brain: a brain mapping study
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Dissociation between goal-directed and discrete response localization in a patient with bilateral cortical blindness
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On the origin of the N400 effects: An ERP waveform and source localization analysis in three matching tasks
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Abstract:
The question of the cognitive nature and the cerebral origins of the event-related potential (ERP) N400 component has frequently been debated. Here, the N400 effects were analyzed in three tasks. In the semantic task, subjects decided whether sequentially presented word pairs were semantically related or unrelated. In the phonologic (rhyme detection) task, they decided if words were phonologically related or not. In the image categorization task, they decided whether images were categorically related or not. Difference waves between ERPs to unrelated and related conditions (defined here as the N400 effect) demonstrated a greater amplitude and an earlier peak latency effect in the image than in semantic and phonologic tasks. In contrast, spatial correlation analysis revealed that the maps computed during the peak of the N400 effects were highly correlated. Source localization computed from these maps showed the involvement in all tasks of the middle/superior temporal gyrus. Our results suggest that these qualitatively similar N400 effects index the same cognitive content despite differences in the representational formats (words vs. images) and the types of mismatch (semantic vs. phonological) across tasks.
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Keyword:
2702 Anatomy; 2728 Clinical Neurology; 2741 Radiology Nuclear Medicine and imaging; 2808 Neurology; 3614 Radiological and Ultrasound Technology; Event-related potentials; Image categorization; Rhyme detection; Semantic judgment; Source localization
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URL: https://espace.library.uq.edu.au/view/UQ:ba9e918
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| 9 |
Language Control and Lexical Competition in Bilinguals: An Event-Related fMRI Study
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| 10 |
Language control and lexical competition in bilinguals: An event-related fMRI study
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| 11 |
Language Control and Lexical Competition in Bilinguals: An Event-Related fMRI Study
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Language selection in bilinguals: A spatio-temporal analysis of electric brain activity
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The time course of semantic category processing in the cerebral hemispheres: an electrophysiological study
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Spatio-temporal analysis of electric brain activity during semantic and phonological word processing
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Spatio-temporal analysis of electric brain activity during semantic and phonological word processing
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