2.1 Principles of Electric Circuitry
An electric field therapy apparatus applies a high voltage (for instance, 9,000V) to the body (but no electric current is applied) to generate a potential difference between the body and a wall or the floor of the room (normally 0V) and to produce electric fields (space in which electric forces work) around the body. An electric field therapy apparatus is a physiotherapy apparatus that utilizes the actions that the electric fields have on the body.
2.2 Electro-physical Principles
2.2.1 Distribution of an electric field in space
An electric field therapy apparatus is a physiotherapy apparatus that utilizes the actions of the electric fields that surround the body. In case 10,000V is applied thorough an accessory mat, it was simulated with a computer analysis. It showed higher kV/m2 at head, hip, knees and foot while the floor, ceiling and walls were kept at 0V.
2.2.2 Distribution of electric field strength on the body surface
For a computer analysis of the distribution of electric field strength on the body's surface, 10,000 V of electricity are applied through an accessory plate. An intense concentration of electric fields can be seen on the head and in the fingers.
2.2.3 Internal inductive current
When an electric field is generated around the body, a very small amount of electric current (microampere: one one-millionth of an ampere) is generated inside the body. This is called an internal inductive current. Its level varies from 1(head) to 23(calf ankle) mA/ m2.