What is Neurofeedback and Biofeedback?

Neurofeedback (NFB), also called neurotherapy or neurobiofeedback, is a type of biofeedback that uses realtime displays of electroencephalography (EEG) or hemoencephalography (HEG) to illustrate brain activity and teach self-regulation. EEG neurofeedback uses sensors that are placed on the scalp to measure brain waves, while HEG neurofeedback uses infrared (IR) sensors or functional magnetic resonance imaging (fMRI) to measure brain blood flow.

Neurofeedback is a type of biofeedback that measures brain waves or brain blood flow to produce a signal that can be used as feedback on brain activity to teach self-regulation. Feedback is commonly provided using video or sound, with positive feedback for desired brain activity and negative feedback for brain activity that is undesirable.

Source: Wikipedia