For Neurofeedback, the same process as BIOfeedback occurs (See definition), but the sensors

 are monitoring the electrical impulses from within the brain, usually referred to as

 "brainwave patterns". Sensors (electrodes) are placed & monitored from the head/scalp.

 for medications such as Ritalin for Attention Deficit disorder, Anti-depressants,

 blood pressure medicines, muscle relaxants, and anxiety medications, and may even

 enable a patient to discontinue their medication completely!

The equipment, often computerized, is used to pick up the often imperceptible sensory

 information given from, in this example, certain areas of the brain; it is then "fed back" to the

 patient and therapist in a recognizable format (such as an audible tone/sound or screen-visual)

 so that the appropriate internal changes can be made.

This results in voluntary control of cognitive functioning or "Mood" by the patient where before

 only unconscious control existed.

Biofeedback and Neurofeedback therapies are NON-INVASIVE techniques that

 utilize the innate  capacity of a person to exercise greater control over his / her own life

 and is focused on healthier,  enhanced living, rather than disease.

If you have had a medical exam recently, permission to consult with your 

physician may be  asked in order to coordinate your treatment and be certain there are

 no contraindications for Biofeedback to take place.