title: Trait anxiety impact on posterior activation asymmetries at rest and during evoked negative emotions: EEG investigation.
abstract: The main objective of the present investigation was to examine how high trait anxiety would influence cortical EEG asymmetries under non-emotional conditions and while experiencing negative emotions. The 62-channel EEG was recorded in control (n=21) and high anxiety (HA, n=18) non-patient individuals. Results showed that in HA subjects, the lowest level of arousal (eyes closed) was associated with stronger right-sided parieto-temporal theta-1 (4-6 Hz) and beta-1 (12-18 Hz) activity, whereas increased non-emotional arousal (eyes open, viewing neutral movie clip) was marked by persisting favored right hemisphere beta-1 activity. In turn, viewing aversive movie clip by the HA group led to significant lateralized decrease of the right parieto-temporal beta-1 power, which was initially higher in the emotionally neutral conditions. The EEG data suggests that asymmetrical parieto-temporal theta-1 and beta-1 EEG activity might be better interpreted in terms of Gray's BAS and BIS theory.
authors.affiliation: Psychophysiology Laboratory, State-Research Institute of Physiology, Siberian Branch, Russian Academy of Medical Sciences, Timakova str. 4, 630117, Novosibirsk, Russia. aftanas@iph.ma.nsc.ru
authors.forename: Ljubomir I
authors.initials: LI
authors.lastname: Aftanas
authors.forename: Sergey V
authors.initials: SV
authors.lastname: Pavlov
mesh_terms: D000293:Adolescent; D000328:Adult; D000704:Analysis of Variance; D001007:Anxiety / Q000503:physiopathology*; D001143:Arousal / Q000502:physiology; D001931:Brain Mapping; D002540:Cerebral Cortex / Q000033:anatomy & histology / Q000503:physiopathology*; D004569:Electroencephalography; D004644:Emotions / Q000502:physiology*; D005260:Female; D005583:Fourier Analysis; D007839:Functional Laterality / Q000502:physiology*; D006801:Humans; D008297:Male; D016192:Resting Phase, Cell Cycle / Q000502:physiology