Types of Biofeedback Machines or Biofeedback Techniques
Galvanic skin response (GSH) or Electrodermal Response
Also known as
Electrodermal Response (EDR), Galvanic skin response measures electrical conductance in the skin,
which is associated with the activity of the sweat glands. A very slight electrical
current (unnoticeable to you) is run through your skin. The machine measures changes in
the salt and water in your sweat gland ducts. The more emotionally aroused you are, the
more active your sweat glands are and the greater the electrical conductivity of your
skin. GSR is effective in treating phobias, anxiety, excessive sweating, and, at times,
stuttering since these emotions will affect your skin's conductivity. It is used as a lie
detection test. Athletes use this technique to prepare for games - to make sure that they
are not too anxious or have pre-game jitters.
Next: Electroencephalogram (EEG)
Other Types of
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