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Brain Wave States and Their Correlated Frequency and Physiology.
| Brain Wave | Frequency (Hz) | Physiology |
|---|---|---|
| Gamma | 30–100 | Peak performance |
| Beta | 12–30 | Awake—normal alert consciousness |
| Alpha | 8–12 | Relaxed, calm, lucid, not thinking |
| Theta | 4–7 | Deep relaxation and meditation, mental imagery |
| Delta | 0.3–4 | Deep dreamless sleep |
