Alpha brainwave is one of the four basic brainwaves. These four brain waves are DELTA, THETA, ALPHA and BETA. These four kinds of brain waves constitute EEG. Eeg is the display of brain waves in the brain, but the voltage of brain waves in the brain is very small, only a few millionths of a volt. The average oscillation of alpha brainwaves is 10 times/second. Among brain waves, alpha brain waves were first discovered. 1908, Dr. Hans Berg, an Austrian medical scientist, first made this discovery and called it alpha wave, because alpha ranked first in the ranking of Greek letters, which is the same as the English letter A.

In the past hundred years, countless scientists have spent a lot of time studying alpha brainwaves, so they have accumulated rich knowledge and conclusions about the basic research of alpha brainwaves.

Δ brainwaves only appear in deep sleep, θ brainwaves appear in shallow sleep, and α brainwaves appear in early sleep or early waking (that is, when you are half asleep and half awake). At this point, your body is in a relaxed state, and you are consciously vigilant. When you are awake, you will have beta brain waves, accompanied by the concentration you need to achieve. The oscillation frequency of δ brainwave is 0-4 Hz/sec, zeta brainwave is 4-7 Hz/sec, α brainwave is 8- 13 Hz/sec, and Bita brainwave is 13-40 Hz/sec ... Of course, there are other brainwaves, but that is under special circumstances, such as unexpected stimulation. The four brain waves mentioned above constitute the overall arrangement of EEG.