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Table 1 primary EEG frequencies

From: Electroencephalographic correlates of Chronic Fatigue Syndrome

Frequency name Frequency range (Hertz)
Delta 0.5 - 3.99
Theta 4.0 - 7.99
Alpha 8.0 - 11.99
Sigma 12.0 - 13.99
Beta 14.0 - 24.99