title: Comparison of EEG propagation speeds under emotional stimuli on smartphone between the different anxiety states.
abstract: The current study evaluated the effect of different anxiety states on information processing as measured by an electroencephalography (EEG) using emotional stimuli on a smartphone. Twenty-three healthy subjects were assessed for their anxiety states using The State Trait Anxiety Inventory (STAI) and divided into two groups: low anxiety (I, II) or high anxiety (III and IV, V). An EEG was performed while the participant was presented with emotionally laden audiovisual stimuli (resting, pleasant, and unpleasant sessions) and emotionally laden sentence stimuli (pleasant sentence, unpleasant sentence sessions) and EEG data was analyzed using propagation speed analysis. The propagation speed of the low anxiety group at the medial coronal for resting stimuli for all time segments was higher than those of high anxiety group. The low anxiety group propagation speeds at the medial sagittal for unpleasant stimuli in the 0-30 and 60-150 s time frames were higher than those of high anxiety group. The propagation speeds at 150 s for all stimuli in the low anxiety group were significantly higher than the correspondent propagation speeds of the high anxiety group. These events suggest that neural information processes concerning emotional stimuli differ based on current anxiety state.
authors.affiliation: Department of Physiology and Biological Information, Dokkyo Medical University Tochigi, Japan.
authors.forename: Tetsuya
authors.initials: T
authors.lastname: Asakawa
authors.affiliation: Graduate School of Applied Informatics, University of Hyogo Hyogo, Japan.
authors.forename: Ayumi
authors.initials: A
authors.lastname: Muramatsu
authors.affiliation: Department of Medical Engineering, Aino University Osaka, Japan.
authors.forename: Takuto
authors.initials: T
authors.lastname: Hayashi
authors.affiliation: Faculty of The Physical Education, Osaka University of Health and Sports Science Osaka, Japan.
authors.forename: Tatsuya
authors.initials: T
authors.lastname: Urata
authors.affiliation: KDDI R & D Laboratories Inc. Saitama, Japan.
authors.forename: Masato
authors.initials: M
authors.lastname: Taya
authors.affiliation: Graduate School of Applied Informatics, University of Hyogo Hyogo, Japan.
authors.forename: Yuko
authors.initials: Y
authors.lastname: Mizuno-Matsumoto
keywords: EEG; anxiety states; emotional stimuli; propagation speed; smartphone