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"Crossed” somatoparaphrenia: an unusual new case and a review of the literature
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Very early processing of emotional words revealed in temporoparietal junctions of both hemispheres by EEG and TMS
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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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Brain State-dependent Functional Hemispheric Specialization in Men but not in Women
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Crossed somatoparaphrenia: an unusual new case and a review of the literature
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In: http://infoscience.epfl.ch/record/208435 (2015)
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Hemispheric specialization varies with EEG brain resting states and phase of menstrual cycle
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In: ISSN: 1932-6203 ; PLOS ONE, Vol. 8, No 4 (2013) P. e63196 (2013)
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Hemispheric Specialization Varies with EEG Brain Resting States and Phase of Menstrual Cycle
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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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In: ISSN: 0896-0267 ; Brain Topography, Vol. 23, No 3 (2010) pp. 311-320 (2010)
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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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Brain State-dependent Functional Hemispheric Specialization in Men but not in Women
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Brain State-dependent Functional Hemispheric Specialization in Men but not in Women
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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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Abstract:
There is an ongoing debate in cognitive neuroscience about the time course and the functional independence of the different processes involved in encoding written language material. New data indicate very fast and highly parallel language analysis networks in the brain. Here we demonstrate a methodological approach to study the temporal dynamics of this network by searching for time periods where different task demands emphasize different aspects of the network. Multi-channel event related potentials (ERPs) were recorded during a semantic and a phonological reading task from 14 healthy subjects. Signals were analyzed exclusively on the basis of the spatial configuration of the electric potential distributions (ERP maps), since differences in these spatial patterns directly reflect changes in the configuration of the active sources in the brain. This analysis did not reveal any differences of the evoked brain electric fields between the two tasks up to 280 ms post-stimulus. The ERP maps then differed for a brief period between 280 and 380 ms, before they were similar again. The analysis of the maps using a global linear localization procedure revealed a network of areas, active in both tasks, that mainly involved the left postero-temporal and left antero-temporal regions. The left posterior activation was found already around 100 ms post-stimulus, indicating that language-specific functions appear early in time. We therefore conclude that phonological and semantic processing are essentially performed in both tasks and that only late decision-related processes influence the relative strength of activity of the different modules in the complex language network.
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URL: https://doi.org/10.1016/s0167-8760(99)00017-3 http://eprints.gla.ac.uk/206407/
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Spatio-temporal analysis of electric brain activity during semantic and phonological word processing
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