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Brain waves (frequency bands)
Also known as: Alpha waves, Beta waves, Theta, Delta, Gamma, Neural oscillations
Rhythmic patterns in brain activity, grouped by frequency: delta, theta, alpha, beta and gamma.
| Band | Approx. frequency | Often linked with |
|---|---|---|
| Delta | 0.5–4 Hz | Deep sleep |
| Theta | 4–8 Hz | Drowsiness, memory |
| Alpha | 8–13 Hz | Relaxed wakefulness, eyes closed |
| Beta | 13–30 Hz | Active thinking, movement |
| Gamma | 30+ Hz | Information processing |
These links are broad tendencies, not mind-reading: no single band means “focused” or “calm” on its own.
Last updated Sep 30, 2026. Educational content, not medical advice.