Extended data:
Abnormal neurotransmitters, amino acid neurotransmitters and neurotrophic factors may induce diseases. 3. Abnormal neurodevelopment: The patient's brain failed to develop normally from the beginning. Due to the interaction of heredity and some risk factors, there were some pathological changes in brain development during the embryonic period, when the symptoms were not obvious, but when he entered adolescence or early adulthood, he eventually became ill under the bad stimulation of external environmental factors. Schizophrenia, children's attention deficit disorder and autism may be a disease spectrum, and they may have the same neurodevelopmental abnormalities before the onset. 4, infection: infection factors affect the central nervous system, leading to mental disorders. Psychosocial factors: including stressful life events, emotional state, personality characteristics, gender, parental rearing patterns, social class, socio-economic status, race, cultural background, interpersonal relationship, etc. 1, stress: Long-term stress can lead to neurosis, psychosomatic diseases, etc. The stressors mainly come from love, marriage and family problems, interpersonal relationships in study and workplace, experiences in social life such as war, flood, earthquake, traffic accidents, discrimination, personal special experiences such as congenital/acquired defects and so on. Personality characteristics: people who are introverted, timid and avoid stimulation are easy to be pessimistic when encountering difficulties, have poor psychological stress tolerance, and are prone to neurosis, psychosomatic diseases, alcoholism and drug abuse. For example, people with acting personality are prone to hysteria, people with obsessive-compulsive personality are prone to obsessive-compulsive disorder, and people with schizophrenic personality disorder are prone to schizophrenia.