Neurology treats disorders of the nervous system. Psychiatry treats disorders of the mind. For a long time, these worlds were kept politely separate—one dealing with myelin, axons, and lesions, the other with mood, fear, and thought. In this episode, we tear down that artificial wall. By examining anxiety disorders, affective disorders, and schizophrenia, we explore how studying breakdowns in brain function reveals the mechanisms of normal cognition, emotion, and behavior. Mental illness is no longer beyond neuroscience—and understanding what goes wrong may be the fastest way to understand how the brain works at all.