What Are Gamma Brainwaves? A Simple Guide

Your brain's activity can be measured as electrical rhythms, usually with a test called an EEG. Scientists group these rhythms into bands, and gamma is the fastest of them.

The main brainwave bands

• Delta: the slowest, linked to deep sleep.
• Theta: linked to drowsiness and light sleep.
• Alpha: linked to relaxed, calm wakefulness.
• Beta: linked to alert, active thinking.
• Gamma: the fastest band, usually described as roughly 30 Hz and above.

The exact ranges vary between sources.

What are gamma waves linked to?

Researchers have linked gamma activity to attention and to how the brain combines information, including memory processes. That is an association, not proof that boosting gamma waves improves thinking in everyday life.

Why do audio programs mention gamma?

Some audio programs, including the brain song, say their sound patterns are designed to encourage gamma activity. Research on gamma stimulation exists, but much of it is in laboratory and clinical settings, and larger evidence of benefit is still limited.

If you are curious how one program describes this, see our Brain Song review.

Our review page contains affiliate links. We may earn a commission if you buy through them, at no extra cost to you. This post is for general information only and is not medical advice.