Neuropsychiatry is a subspecialty that focuses on the integration of neurology and psychiatry, combining knowledge from both fields to understand, diagnose, and treat disorders that involve both the brain and behavior. It addresses conditions where mental disorders (such as schizophrenia, mood disorders, anxiety disorders) are thought to be caused or influenced by underlying neurological conditions (such as epilepsy, dementia, Parkinson's disease). Neuropsychiatrists evaluate, manage, and treat patients with complex neurobehavioral disorders using a comprehensive approach that considers biological, psychological, and social factors.

A mental disorder is a syndrome characterized by clinically significant disturbance in an individual's cognition, emotion regulation, or behavior. It's associated with distress and/or impaired functioning in social, occupational, or other important areas of life, often leading to a decrease in quality of life. These disorders are typically persistent and can be severe and disabling. They may be related to factors such as genetics, early childhood experiences, or trauma. Examples include depression, anxiety disorders, bipolar disorder, schizophrenia, and personality disorders. It's important to note that a diagnosis should be made by a qualified mental health professional.