Greg Siegel and Kym Young are well known PhD Neuroscientists of national stature. They record a person’s brain status/condition (other key physiological parameters) when this person is in their normal happy state. When and if that person suffers a psychiatric disorder, the therapeutic approach is to restore this persons brain, other physiological parameters, to their previously normal condition. This new and novel therapeutic approach is “precision psychiatry”. Such a patient might be before and after seasonal depression.