Abstract

The dynamics of the EEG activity under light stimulation was investigated in terms of the nonstationary power spectrum method. The alpha wave was blocked by light stimulation, however the blocking was temporary, and the alpha activity recovered to that of the resting state even though under light. Moreover the alpha rhythm was also blocked by light off. The frequencies of the preand post-blocked activity were different. The frequency of the post-blocked wave shifted gradually downward and became stable after 3–4 sec.

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