There are visible changes in EEG in transition from an awake resting state with eyes closed (REC) to an awake resting state with eyes opened (REO). These changes are usually treated as reflexion of brain activity reorganization in reply to visual perception. In present investigation we examined EEG records in awake resting states with opened and closed eyes in complete darkness. 30 healthy volunteers participated in this investigation. EEG (1.5-50 Hz) were recorded according to standard methods from 19 zones. EEG spectral power and coherence analysis demonstrates that REC and REO states differ even if the comparison corresponds to a situation of complete darkness. The differences are significant in any of the frequency ranges delta, theta, alpha1, alpha2, beta1, beta2, gamma. As compared states REC and REO don't differ neither by external visual information nor by illumination level therefore we presumably consider observed EEG changes as correlated with involuntary shift of anticipatory attention from interoceptive state with eyes closed to exteroceptive state with eyes opened.
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