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Electroencephalography (EEG) brainwaves and corresponding brain state.
| Brainwaves | Frequencies (Hz) | Brain State |
|---|---|---|
| Low alpha | 8–10 | A sense of security to the surrounding environment, slack, unguarded |
| High alpha | 10–12 | No stress and anxiety, relaxed but wakeful |
| Low beta | 12–20 | Focused on mental activity |
| High beta | 20–30 | Excited, alert, attentive |
