The constellation of behaviours we call addiction is…

““The constellation of behaviours we call addiction is provoked by a complex set of neurological and emotional mechanisms that develop inside a person. These mechanisms have no separate existence and no conscious will of their own, even if the addict may often experience himself as governed by a powerful controlling force or as suffering from a disease he has no strength to resist. So it would be more accurate to say: addiction may not be a natural state, but the brain regions in which its powers arise are central to our survival. The force of the addiction process stems from that very fact. Here’s an analogy: let’s say the section of someone’s brain that controls body movements — the motor cortex — was damaged or did not develop properly. That person would inevitably have some kind of physical impairment. If the affected nerves managed nothing more than the motions of the little toe, any loss would hardly be noticeable. If, however, the damaged or undeveloped nerves governed the activity of a leg, the person would have a significant disability. In other words, the impairment would be proportional to the size and importance of the malfunctioning brain centre. So it is with addiction. There is no addiction centre in the brain, no circuits designated strictly for addictive purposes. The brain systems involved in addiction are among the key organizers and motivators of human emotional life and behaviour; hence, addiction’s powerful hold on human beings.””

— Gabor Maté