What Are the Different Brain Waves?

Brain Wave Type Cycles per second Details
Delta waves 0-4 hertz Typically associated with deep sleep.
Theta waves 4-7 hertz Typically associated with light sleep or very relaxed, meditative states.
Alpha waves 7-14 hertz Relaxed wakefulness.
Beta waves 15-30 hertz Focused concentration and processing. The higher levels are associated with stress, anxiety and even obsessive rumination.
Gamma waves 32+ hertz Multi-modal sensory processing that involves processing two different sensory inputs