Brain frequencies

Brain frequencies can be measured with sensors placed on the scalp and displayed as brain waves, graphs, or data. Brain frequencies can be displayed as they are generated by the brain (in real time) and recorded for for later use.

Brain frequencies are waves and vary in amplitude (height) and frequency. The number of waves per second is refered to as hertz or Hz.

Brain frequencies can reveal a surprising amount of information as to the physical and mental state of the person being measured. A range of brain frequencies are generated in each of the brain hemispheres.

Commonly recognized ranges of brain frequencies

Beta brain frequencies

These waves are 14 Hz to 30 Hz higher and are the dominant brain frequencies when our eyes are open, when we are listening, thinking, analyzing, problem solving, judgeing, making decisions, and processing information about the world around us.

Alpha brain frequencies

These waves are 8 to 13.9 Hz and are the dominant brain frequencies when we are relaxed. Healthy alpha production promotes mental resourcefulness, assists in the ability to mentally coordinate, enhances overall sense of relaxation. Most people feel at ease and calm. Alpha is the bridge between the conscious and the subconscious.

Theta brain frequencies

These waves are 4 to 7.9 Hz and are connected with creativity, intuition, daydreaming, and fantasizing, storing memories, emotions, and sensations. Theta waves are strong during internal focus, meditation, prayer, and spiritual awareness.

Delta brain frequencies

These waves are 0.1 to 3.9 Hz and occur in deep sleep, in some abnormal processes, and during experiences of empathy. Delta waves are tied to our ability to integrate and let go.

Other brain frequencies

There are several lessor acknowledged ranges of brain frequencies that occur above 30 Hz named gamma, hypergamma, lambda, and epsilon.

Return to Brain facts from Brain frequencies