Attention deficit disorder, also known as hyperactive child syndrome, is the most common neurodevelopmental disorder in childhood, and is mainly manifested by behavioral disorders, attention disorders, irritability, impulsivity, restlessness, and poor academic performance. It is also called attention deficit hyperactivity disorder (ADHD) and attention deficit hyperactivity disorder (ADHD). It was once called "minimal brain dysfunction" (MBD). However, according to research in the past 20 years, many children diagnosed with MBD have no history or signs of brain damage. In addition, many children with brain damage do not have hyperactivity symptoms. With the progress of modern cognitive psychology research, it is believed that the core defect of this disease may exist in the body's processing or transmission (reaction) of information, or it may be that the body's ability to integrate information is defective, resulting in poor selective inhibition of motor reactions.