title: Mental rotation process for mirrored and identical stimuli: a beta-band ERD study.
abstract: This study investigated mental rotation for identical stimuli and mirrored stimuli by both behavior response and event-related desynchronization (ERD) of EEG signals. Results showed that subjects had longer response time for mirrored stimuli than identical stimuli. Beta-band desynchronization appeared in whole brain with the parietal-occipital dominance. The ERD in beta band recovered slowly in an angular order after 450-600 ms of stimulus onset except the sharp rebound in the case of identical stimuli with rotation at 0 °. This temporal difference of beta ERD between the identical and the mirrored stimuli at 0° rotation and the ERD topographic difference in left fronto-parietal regions, together with the behavior difference, may imply an extra flip process in mirrored condition.
authors.forename: Hongzhou
authors.initials: H
authors.lastname: Chen
authors.forename: Xiaoli
authors.initials: X
authors.lastname: Guo
authors.forename: Yuanyuan
authors.initials: Y
authors.lastname: Lv
authors.forename: Junfeng
authors.initials: J
authors.lastname: Sun
authors.forename: Shanbao
authors.initials: S
authors.lastname: Tong
mesh_terms: D001921:Brain / Q000502:physiology*; D004569:Electroencephalography; D005071:Evoked Potentials / Q000502:physiology; D005260:Female; D064368:Healthy Volunteers; D006801:Humans; D008297:Male; D008606:Mental Processes / Q000502:physiology*; D011930:Reaction Time; D055815:Young Adult