Biofeedback, quite simply, is any technique which takes a measurement of the body, and provides a result. A scale can be said to be a biofeedback device that measures weight; a thermometer is one that measures body temperature.
We can measure factors of the body electric such as the voltage from the firing brain cells, the amperage of heart muscle contractions, the voltage of the muscles and the resistance in the flow of electricity of the skin. We can measure the oscillations of these factors as seen by the EEG, ECG, EMG and GSR.
The same technological theories that brought us biofeedback in the 1960’s, have also brought devices like the CAT Scan, the MRI, TENS, ultra-sound, and many other sophisticated technologies used in our health care systems.
The information measured with a biofeedback device is then “fed-back” to the client, informing them of various physiological parameters and stress responses within the body. This educates them about the need to retrain their body’s stress responses and balance the body electric, make lifestyle changes or learn to control physiological reactions, in order to achieve improved relaxation and better health overall.