does anyone have a very simple definition for what biofeedback is and its opposite?

Question

Thanks Bobcarney!!

Answer 1

This is catchy buzz phrase many latched onto so there's no good simple definition. Measuring responses sent by the body to the brain is simplest general answer this person can offer. The opposite would be no brain waves or brain dead for those that consider brain part of body

Answer 2

this is what I got:
Definitions of biofeedback:

noun: a training program in which a person is given information about physiological processes (heart rate or blood pressure) that is not normally available with the goal of gaining conscious control of them