CES mostly refers to the application of Alternating Current to the brain (as distinct from Direct Current). In other words, the polarity of the two electrodes keeps on switching between positive and negative (and you thus do not need to take care which electrode is positive or negative).
In bio-electronics, the word “biphasic” is used to refer to alternating current. One of the advantages of a biphasic current is that the local tissues don’t get polarised, thus reducing the risk of tissue damage.
CES also typically employs low intensity currents, meaning the user hardly feels the flow of electricity. CES is most commonly administered via the earlobes, although it can also be administered by sticking pre-gelled electrodes just behind the ears or on the shoulders.
The body is an electric organ. In fact, that is where the name “Elexoma” comes from. It is a combination of “Elec” for “electricity” and “soma”, the Greek word for “body”. Every chemical reaction in the body involves changes in electrical values and these are not merely accidental.
The brain, nerves, muscles, blood vessels and glands all operate based on electrical balance and current flows. The currents involved are tiny, but essential for life. The “old school thinking” that used overwhelming electrical force to achieve therapeutic aims is dying out as new research increasingly proves that cells respond best to electricity that is in the same league as the normal bodily voltage and intensity.