In “The Mind’s Biology,” Amy Ellis Nutt reports that some doctors are reaching past the symptoms of mental illness to identify and fix the brain circuits underlie the problems. One of those doctors is Hasan Asif. “Asif says that a person’s mental makeup is a kind of hierarchy, with personality on top, which is created by brain states that arise from circuits firing in a certain pattern below. With psychotherapy, you tweak the brain from the top down, dealing first with a patient’s personality and temperament. But with neurofeedback, combined with qEEG, he said, he tweaks his patients from the bottom up, identifying the brain areas involved and then retraining those circuits to fire differently, resulting in changed moods or mental outlooks.”