<unk>  <unk>  or TNS) is the use of electric current produced by a device to stimulate the nerves for therapeutic purposes.<unk> , by definition, covers the complete range of<unk> ly applied currents used for nerve excitation although the term is often used with a more restrictive intent, namely to describe the kind of pulses produced by portable stimulators used to reduce pain. The unit is usually connected to the skin using two or more electrodes which are typically conductive gel pads. A typical battery-operated<unk>  unit is able to modulate pulse width, frequency, and intensity. Generally,<unk>  is applied at high frequency (>50 Hz) with an intensity below motor contraction (sensory intensity) or low frequency (<10 Hz) with an intensity that produces motor contraction. More recently, many<unk>  units use a mixed frequency mode which alleviates tolerance to repeated use. Intensity of stimulation should be strong but comfortable with greater intensities, regardless of frequency, producing the greatest analgesia. While the use of<unk>  has proved effective in clinical studies, there is controversy over which conditions the device should be used to treat.
Transcutaneous electrical nerve stimulation
Repetitive nerve stimulation
Percutaneous tibial nerve stimulation
Electrical muscle stimulation
Nerve conduction study
Nerve biopsy
Femoral nerve stretch test
Electromyography