title: Hemispheric specialization varies with EEG brain resting states and phase of menstrual cycle.
abstract: A growing body of behavioral studies has demonstrated that women's hemispheric specialization varies as a function of their menstrual cycle, with hemispheric specialization enhanced during their menstruation period. Our recent high-density electroencephalogram (EEG) study with lateralized emotional versus neutral words extended these behavioral results by showing that hemispheric specialization in men, but not in women under birth-control, depends upon specific EEG resting brain states at stimulus arrival, suggesting that hemispheric specialization may be pre-determined at the moment of the stimulus onset. To investigate whether EEG brain resting state for hemispheric specialization could vary as a function of the menstrual phase, we tested 12 right-handed healthy women over different phases of their menstrual cycle combining high-density EEG recordings and the same lateralized lexical decision paradigm with emotional versus neutral words. Results showed the presence of specific EEG resting brain states, associated with hemispheric specialization for emotional words, at the moment of the stimulus onset during the menstruation period only. These results suggest that the pre-stimulus EEG pattern influencing hemispheric specialization is modulated by the hormonal state.
authors: Department of Psychology, High Performance Electrical NeuroImaging Laboratory, Center for Cognitive and Social Neuroscience, The University of Chicago, Chicago, Illinois, United States of America.
authors: Stephanie
authors: S
authors: Cacioppo
authors: Francesco
authors: F
authors: Bianchi-Demicheli
authors: Paul
authors: P
authors: Bischof
authors: Dominique
authors: D
authors: Deziegler
authors: Christoph M
authors: CM
authors: Michel
authors: Theodor
authors: T
authors: Landis
mesh_terms: D001921:Brain / Q000502:physiology*; D004292:Dominance, Cerebral; D004569:Electroencephalography; D004644:Emotions / Q000502:physiology; D005260:Female; D006801:Humans; D008597:Menstrual Cycle
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