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EEG average power spectrum for n = 15 participant during eyes-open task (red line), 2D screen (blue line) and 3D VR (orange line) in the Fz, Cz and Pz channels. Blue shade = Delta (1–4 Hz), Yellow shade = Theta (4–8 Hz), Gray shade = Alpha (8–12 Hz), Green shade = Beta (12–30 Hz) and Pink shade = Gamma (30–45 Hz).
