All electro-physical modalities introduce some physical energy into the body, resulting in one or more physiological changes that are used for therapeutic benefit for example: Therapeutic Ultrasound and LIPUS are used for tissue repair, TENS and Interferential therapy for pain relief. The over-riding principles of Electrotherapy modalities is to enhance the natural ability of the body to stimulate, direct and control the healing and reparative processes (Watson 2013).
