MAOA, Brain Regulation, and the Risk of Dangerous Human Behavior
A Neurobiological and Environmental Perspective Abstract Dangerous and violent human behavior has long been a subject of interest in neuroscience, psychology, and criminology. Among biological factors studied, monoamine oxidase A (MAOA) has received particular attention due to its role in regulating neurotransmitters critical for emotional control and impulse regulation. This article reviews the function of MAOA in the brain, its interaction with environmental stressors—especially early-life trauma—and clarifies common misconceptions that falsely portray MAOA as a deterministic cause of psychopathy or violence. The role of monoamine oxidase B (MAOB) is contrasted to highlight its lack of association with aggressive or antisocial behavior. 1. MAOA: Function and Brain Distribution MAOA (monoamine oxidase A) is an enzyme expressed across multiple brain regions , rather than a single anatomical structure. Its primary function is to metabolize monoamine neurotransmitters, including:...