Electrodes

The human body's nervous or muscular system uses the ebb and flow of ions to communicate. This ionic transport within and along the nerve fibers can be measured on the surface of the skin using a specific type of electrochemical sensor commonly referred to as the surface recording electrode (sometimes just called the electrode).

The purpose of the electrode is to act as a transducer between the ionic transport of the nerve/ muscle and the electron flow in copper wire. It is the junction between the electrode and the electrolyte that allows such a transduction to take place.