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IBVA-BRAINWAVE-1996
ALPHA, THETA & DELTA FOCUS CHANGES
Left brain=high Alpha
focus chanages, low Beta
Right=low Delta focus
changes, low Alpha focus changes

Alpha = 8 to 12 Hz
focus changes =
change
frequency in narrow / draw curve
Beta = 13 to 35 Hz
Delta = 2 to 3 Hz
Theta = 4 to 7 Hz