bioelectricity is one of the basic characteristics of life activities, and all kinds of living things have electrical activities, from whales to bacteria, with strong or weak bioelectricity. In fact, the word "cell" in English also has the meaning of battery, and countless cells are equivalent to miniature small batteries, which are the source of bioelectricity.
There are many nerve cells in the human brain that are active, resulting in electrical changes. In other words, there is an electrical swing. And this kind of swing appears on scientific instruments and looks like a wave. The electrical vibration in the brain is called brainwave. To explain brain wave in one sentence, it may be said that it is bioenergy produced by brain cells, or the rhythm of brain cell activity.
at the end of 19th century, German physiologist Hans Berger (1924) saw electric eels emit electricity, and thought that there must be the same phenomenon in human beings, and discovered the electric vibration in human brain. Later, I learned the existence of vibration by catching brain waves with charts. Because this corresponds to human consciousness to some extent, it has aroused the interest of many researchers.