What is Electrical Therapy?
Interferential current therapy, is a variant of TENS that uses the principle of amplitude modulation to decrease the discomfort of stimulating deeper tissues (e.g., muscle) when using applied electric current. A combination of different stimulation frequencies are used to generate frequencies between 4 and 250 Hz which more effectively penetrate the soft tissues while producing less discomfort at the skin surface. With Interferential current, its postulated mechanism of analgesic action is through direct stimulation of muscle fibers rather than nerves, improving muscle blood flow and promoting the healing process. Interferential current is used widely in the rehabilitative settings, and there is a plethora of controlled studies to show its effectiveness in the management of both acute or chronic pain syndromes.