| Delta |
0–4 Hz |
State of deep sleep, when there is no focus, the person is totally absent, unconscious. |
| Theta |
4–8 Hz |
Deep relaxation, internal focus, meditation, intuition access to unconscious material such as imaging, fantasy, dreaming. |
| Low Alpha |
8–10 Hz |
Wakeful relaxation, consciousness, awareness without attention or concentration, good mood, calmness. |
| High Alpha |
10–12 Hz |
Increased self-awareness and focus, learning of new information. |
| Low Beta |
12–18 Hz |
Active thinking, active attention, focus towards problem solving, judgment and decision making. |
| High Beta |
18–30 Hz |
Engagement in mental activity, also alertness and agitation. |
| Low Gamma |
30–50 Hz |
Cognitive processing, senses, intelligence, compassion, self-control. |
| High Gamma |
50–70 Hz |
Cognitive tasks: memory, hearing, reading and speaking. |
