2011•Zhongguo yixue wulixue zazhiRequires access
Study on the Characteristics of EEG Alpha Wave Induced by Photic Stimulation Based on the Complexity
Li Wei
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Abstract
Objective:The Lempel-Ziv complexity algorithm is used to study on the characteristics of EEG alpha wave induced by photic stimulation.Methods:EEGs of 20 healthy volunteers(23.2 years old on average) induced by 12 Hz photic stimulation with eyes closed were recorded,and the changes of α rhythm EEG complexity were analyzed before and after photic stimulation.Results:The 12 Hz photic stimulation caused the complexity of 17 volunteers' α rhythm EEG a significant increase(P0.05).The changes of α rhythm EEG complexity were obviously observed at the frontal,right central,top,occipital,right middle temporal,left and right posterior temporal region,and the changes are most obviously observed at the top and occipital region.After photic stimulation,the average complexities of left and right brain's α rhythm both increased,and the change of right brain's α rhythm complexity was more significant.Conclusions:The 12 Hz frequency photic stimulation can induce significant response of EEGs at the same frequency band.The conclusion is useful for studies on the characteristics of brain function induced by photic stimulation and for the exploration on how the external stimulation influence the human brain cognitive activities.