Laser & Optoelectronics Progress, Volume. 49, Issue 3, 31701(2012)
Approximate Entropy Evaluation of EEG θ Rhythm Based on Low-Frequency Photon Stimuli
Utilizing the approximate entropy algorithm, the changes of approximate entropy of electroencephalogram (EEG) θ rhythm (Apen θ) about 19 healthy volunteers before and after 5 Hz frequency photon stimulation (light repeatedly inducing 5 times per second) are analyzed. The results of T-test(P<0.05) show that the 5 Hz photon stimulation can significantly reduce the Apen θ of EEG θ rhythm. These changes can be obviously observed at the forehead, parietal, temporal and occipital region, and the most significant changes happen at temporal region and occipital region. The average Apen θ values about left and right brain EEG are both reduced after photon stimulation, and the Apen θ about right brain EEG is reduced more obviously. It can be concluded that Apen θ induced by external optical stimuli can describe different EEG rhythm characteristics and quantitatively show the extent of photon stimulation.
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Ding Shangwen, Qian Zhiyu, Li Weitao, Tao Ling, Hu Guangxia, Zheng Yang. Approximate Entropy Evaluation of EEG θ Rhythm Based on Low-Frequency Photon Stimuli[J]. Laser & Optoelectronics Progress, 2012, 49(3): 31701
Category: Medical Optics and Biotechnology
Received: Jul. 15, 2011
Accepted: --
Published Online: Jan. 5, 2012
The Author Email: Shangwen Ding (shangwend@126.com)