illustration of Berger effect in EEG
Visual alpha oscillations when eyes are closed versus when eyes are open, recorded with EEG on the scalp surface (broadband filtered). A striking increase in power of oscillations, which is known since almost a century. Very beautiful waveforms! pic.twitter.com/N3PCXVxqBH
— Natalie Schaworonkow (@nschawor) July 31, 2019