Different Types of Brain Waves: Delta, Theta, Alpha, Beta, Gamma

Frequency Range	Name	Usually Associated with:
> 40 Hz	Gamma waves	Higher mental activity, including perception, problem solving, and consciousness
13–39 Hz	Beta waves	Active, busy thinking, active processing , active concentration, arousal, and cognition
7–13 Hz	Alpha waves	Calm relaxed yet alert state
4–7 Hz	Theta waves	Deep meditation /relaxation, REM sleep
< 4 Hz	Delta waves	Deep dreamless sleep, loss of body awareness

Researchers and scientists say, each day brain should exercise each and every frequency for good health.