Below is a list of brainwaves and the different frequencies they operate at:
Delta Brainwaves: These are the most pronounced brainwaves in premature babies. They are of a very low frequency and range from 0.5 to 2Hz
Theta Brainwaves: These are at a higher frequency, typically around 4 to 7 Hz. These brainwaves are characterized by light sleep, rapid eye movement sleep (REM), dreams and hallucinations.
Alpha Brainwaves: Alpha brainwaves are even higher in frequency. Their frequency range is approximately 8-12 Hz. These brainwaves are most prominent during relaxation, contemplation and a lack of visual stimuli. So when you are not distracted or focused on the external world, but rather in your own zone of contemplation, relaxation and awareness, you brain vibrates within this frequency range
Gamma Brainwaves: Gamma brainwaves are of the highest frequency. They range from 40 to 100 Hz, the fasted documented brainwave frequencies known to man.
It has been documented that our Electroencephalography (EEG) dimensions in humans increase with age and time, and also throughout human evolution. EEG is the recording of electrical activity along the scalp. It measures voltage fluctuations resulting from ionic current flows within the neurons of the brain. This is how they are able to measure the different brain waves and the different frequencies they dish out (5).
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