is a biological deficiency in the functions of the central nervous system, This leads to mild behavioral disorders and decreased learning ability. The causes of MBD include many adverse factors that occur during intrauterine development (toxicosis, maternal infectious diseases, etc.), birth injuries, and diseases during the first years of life. Most children with MBD show increased motor activity and mild distraction. Their mood can vary from elevation to depression. Disturbances in spatial perception, counting, and reading may occur. Speech disorders are often observed. In some forms of organic damage to the central nervous system, Mental processes are affected (memory, attention) more, While personality development remains normal. In other cases, There is often a volition-emotional disorder, Which leads to the formation of a psychopathic syndrome characterized by increased arousal, emotional instability and sensitivity.