[Study on sensitivity of event-related EEG sychronization and desychronization visual memory load].
Objective. To examine the effect of visual working memory load on the event-related EEG synchronization and desynchronization. Method. EEG was recorded when 12 normal participants were performing the visual spatial matching task and the abstract geometrical figure matching task in the n-back paradigm in which the memory load varied from 1 to 3. Result. Theta ERS was observed along with alpha ERD. As the memory load increased, the 6-8 Hz ERS decreased and the alpha ERD increased. The theta ERS and alpha ERD elicited by the figure matching task were larger than those in the visual spatial matching task. The fact that most of the differences were observed in the CZ and FZ electrodes was in line with the view that the activation of attention and working memory was often found in prefrontal and parietal regions. Conclusion. The event-related EEG synchronization and desynchronization varies with the visual memory load and therefore are good indicators of memory load.
Shen
Mo-wei
MW
Department of Psychology and Behavioral Science, Zhejiang University, Hangzhou, China. mwshen@zju.edu.cn
Yi
Yu-ji
YJ
Xu
Qing
Q
D000328:Adult; D001288:Attention; D004566:Electrodes; D004569:Electroencephalography; D005071:Evoked Potentials; D006801:Humans; D008570:Memory, Short-Term / Q000502:physiology*; D011597:Psychomotor Performance; D013037:Spatial Behavior; D014785:Vision, Ocular; D014796:Visual Perception