Title :
Mental rotation process for mirrored and identical stimuli: A beta-band ERD study
Author :
Hongzhou Chen ; Xiaoli Guo ; Yuanyuan Lv ; Junfeng Sun ; Shanbao Tong
Author_Institution :
Sch. of Biomed. Eng., Shanghai Jiao Tong Univ., Shanghai, China
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.
Keywords :
electroencephalography; medical signal processing; neurophysiology; psychology; synchronisation; EEG signals; ERD topographic difference; angular order; behavior difference; behavior response; beta ERD; beta-band ERD study; beta-band desynchronization; brain; event-related desynchronization; flip process; identical stimuli; left fronto-parietal regions; mental rotation process; mirrored condition; mirrored stimuli; parietal-occipital dominance; response time; sharp rebound; stimulus onset; temporal difference; time 450 ms to 600 ms; Analysis of variance; Band-pass filters; Electrodes; Electroencephalography; Geometry; Sun; Time factors;
Conference_Titel :
Engineering in Medicine and Biology Society (EMBC), 2014 36th Annual International Conference of the IEEE
Conference_Location :
Chicago, IL
DOI :
10.1109/EMBC.2014.6944734
