Delta and beta EEG oscillation relevant to change detection of visual color under unintentional condition

Color change detection is of great importance in the study of automatic visual processing mechanisms. Although the visual mismatch negativity (vMMN) has been widely explored, the importance of induced components and the precise oscillations of EEG signal have been ignored. In the present study, we conducted the event-related (de)synchronization (ERD/ERS) of the EEG oscillatory activities relevant to the color change detection mechanisms under unintentional condition. The results showed that the deviant stimuli elicited larger ERS than standards in the delta band. The ERD responses were bigger to deviant stimuli than that to standards in the beta band. These data provided new evidence to unintentional automatic visual change detection.