What Are the Different Brain Waves?

Brain Wave TypeCycles per secondDetails
Delta waves0-4 hertzTypically associated with deep sleep.
Theta waves4-7 hertzTypically associated with light sleep or very relaxed, meditative states.
Alpha waves7-14 hertzRelaxed wakefulness.
Beta waves15-30 hertzFocused concentration and processing. The higher levels are associated with stress, anxiety and even obsessive rumination.
Gamma waves32+ hertzMulti-modal sensory processing that involves processing two different sensory inputs