Brainwaves
The electrical rhythms of the brain. From deep sleep delta waves to the hyper-aware gamma state.
Lowest delta brainwave range. Associated with deep dreamless sleep, unconscious bodily processes, and growth hormone release.
Mid-range delta. Deep restorative sleep, cell regeneration, immune system strengthening.
Upper delta range, transitioning toward theta. Deep sleep with occasional dream-like imagery.
Low theta range. Deep meditation, hypnagogic state, creativity, and subconscious access.
Core theta range. Dreaming, REM sleep, deep meditation, memory consolidation, intuitive insights.
Upper theta, close to alpha border. Relaxed awareness, visualization, creative flow. Close to Schumann resonance (7.83 Hz).
Beginning of alpha range. Relaxed, calm wakefulness. Bridge between conscious and subconscious mind.
Core alpha frequency. Relaxed awareness, light meditation, optimal learning state. First discovered by Hans Berger in 1929.
Upper alpha. Alert relaxation, increased focus, cognitive processing.
Low beta. Active thinking, problem solving, focused concentration. Normal waking consciousness.
Active engagement, decision making, complex task processing.
High beta. Intense focus, anxiety, stress, peak performance. Sustained high beta may indicate overthinking.
The 40 Hz gamma wave is associated with binding of sensory information, higher cognition, and consciousness integration. Studied extensively in meditation research.
High gamma. Peak cognitive function, cross-modal sensory processing, moments of insight. Found in experienced meditators.