As you may know, the human brain operates using electrical signals. These signals are called brainwaves or brainwaves. Their transmission rate is measured in Hertz (Cycles per second). The dominant brainwave frequency determines the homonym brain state.
Why dominant? The brain does not operate whole itself in just a single frequency. Some areas of the brain may produce more beta brainwaves while some other areas may produce brainwaves of a different frequency.
The dominant frequency is the one that determines the mind state. So, when we say that we enter the alpha state, this doesn’t mean that our brain generates only alpha brainwaves. It just means that “alphas” are more than the rest.
So, we have the following categories of brainwave frequencies:
o 0.5-4 Hz Delta brainwaves, deep dreamless sleep
o 4-7 Hz Theta brainwaves, REM, super learning mode
o 8-13 Hz Alpha brainwaves, relaxed, drowsiness, mind programming
o 13-30 Hz Beta brainwaves, alertness, fast thinking, anxiety
o 30-100 Hz Gamma brainwaves, Associated with advanced meditation, consciousness elevation.
There are also two new classifications, the lambda and epsilon brainwave frequencies. These two correlate each other as the epsilon waves that have a very low frequency, lower than 0.5 Hz, may contain very high-frequency lambda waves, 100 Hz – 200 Hz. It sounds confusing, but you can spot lambda waves if you zoom in an epsilon wave line.
If you want to learn more about frequencies, check here this website http://www.lunarsight.com/freq.htm.