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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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Abstract:
Hemispheric specialization is reliably demonstrated in patients with unilateral lesions or disconnected hemispheres, but is inconsistent in healthy populations. The reason for this paradox is unclear. We propose that functional hemispheric specialization in healthy participants depends upon functional brain states at stimulus arrival (FBS). Brain activity was recorded from 123 surface electrodes while 22 participants (11 women) performed lateralized lexical decisions (left hemisphere processing) on neutral and emotional (right hemisphere processing) words. We determined two classes of stable FBS, one with right anterior–left posterior orientations (RA-LP maps) and one with left anterior–right posterior orientations (LA-RP maps). Results show that functional hemispheric specialization is dependent upon the class of FBS and gender. Of those with LA-RP maps, only men showed a strong emotional word advantage (EWA) after left visual field (right hemisphere) presentation, but no EWA after right visual field (left hemisphere) presentation. Subsequent to all other brain states, there was an almost equal EWA after presentation to either visual field. Only about half of the FBS in men led to the pattern of functional hemispheric specialization. We suggest that ‘split-brain’ research may be marginally describable by a model, but only in exceptional situations, while in connected brains this functional hemispheric specialization is only one of many dynamic states.
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Keyword:
Articles
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URL: https://doi.org/10.1093/cercor/bhi025 http://cercor.oxfordjournals.org/cgi/content/short/15/9/1451
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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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Spatio-temporal analysis of electric brain activity during semantic and phonological word processing
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