title: Biological Computation Indexes of Brain Oscillations in Unattended Facial Expression Processing Based on Event-Related Synchronization/Desynchronization.
abstract: Estimation of human emotions from Electroencephalogram (EEG) signals plays a vital role in affective Brain Computer Interface (BCI). The present study investigated the different event-related synchronization (ERS) and event-related desynchronization (ERD) of typical brain oscillations in processing Facial Expressions under nonattentional condition. The results show that the lower-frequency bands are mainly used to update Facial Expressions and distinguish the deviant stimuli from the standard ones, whereas the higher-frequency bands are relevant to automatically processing different Facial Expressions. Accordingly, we set up the relations between each brain oscillation and processing unattended Facial Expressions by the measures of ERD and ERS. This research first reveals the contributions of each frequency band for comprehension of Facial Expressions in preattentive stage. It also evidences that participants have emotional experience under nonattentional condition. Therefore, the user's emotional state under nonattentional condition can be recognized in real time by the ERD/ERS computation indexes of different frequency bands of brain oscillations, which can be used in affective BCI to provide the user with more natural and friendly ways.
authors.affiliation: School of Computer Science and Technology, Harbin Institute of Technology, Harbin 150001, China; Software College, Harbin University of Science and Technology, Harbin 150001, China.
authors.forename: Bo
authors.identifier: 0000-0002-6675-5188
authors.initials: B
authors.lastname: Yu
authors.affiliation: School of Computer Science and Technology, Harbin Institute of Technology, Harbin 150001, China.
authors.forename: Lin
authors.initials: L
authors.lastname: Ma
authors.affiliation: School of Computer Science and Technology, Harbin Institute of Technology, Harbin 150001, China.
authors.forename: Haifeng
authors.initials: H
authors.lastname: Li
authors.affiliation: Brain Research Institute, Beijing Yiran Sunny Technology Co. Ltd., Beijing 100088, China.
authors.forename: Lun
authors.initials: L
authors.lastname: Zhao
authors.affiliation: School of Computer Science and Technology, Harbin Institute of Technology, Harbin 150001, China.
authors.forename: Hongjian
authors.initials: H
authors.lastname: Bo
authors.affiliation: School of Computer Science and Technology, Harbin Institute of Technology, Harbin 150001, China.
authors.forename: Xunda
authors.initials: X
authors.lastname: Wang
mesh_terms: D000328:Adult; D000465:Algorithms; D000513:Alpha Rhythm; D016477:Artifacts; D001611:Beta Rhythm; D001921:Brain / Q000502:physiology*; D001931:Brain Mapping / Q000379:methods*; D062207:Brain-Computer Interfaces; D004644:Emotions; D005149:Facial Expression; D005260:Female; D006801:Humans; D008297:Male; D009991:Oscillometry / Q000379:methods*; D010363:Pattern Recognition, Automated; D011897:Random Allocation; D015203:Reproducibility of Results; D012737:Sex Factors; D012984:Software; D055815:Young Adult