Wave Type

Frequency Range

Mental State

Delta wave

0 - 3.5 Hz

Unconscious

Theta wave

4 - 7.5 Hz

Fantasizing

Alpha wave

8 - 12 Hz

Calm, relaxed

Low Beta wave

12 - 15 Hz

Integrated

Mid Beta Wave

16 - 20 Hz

Thinking, aware

High Beta wave

21 - 30 Hz

Alert, agitated

Gamma wave

30 - 100 Hz

Motor functions and higher mental activity