Mental retardation

Mental retardation, also known as mental retardation, is a syndrome caused by brain development disorders that can be caused by multiple causes. It is characterized by mental retardation and social adaptation difficulties, and can be accompanied by a certain mental or physical body. disease. Onset in the developmental stage, with age, intelligence also improved slightly, but moderate and severe patients still bring a heavy burden on the family society. Mild patients have no obvious abnormalities in their physical development. They are often neglected and selected in the recruitment experience, resulting in difficulties in troop training and management and should be watched. The disease is more common, and the overall prevalence reported in foreign countries is 8 ‰ (British) to 10 ‰ (U.S.A.), with moderate and severe cases being 2 ‰. The results of the joint survey of twelve regions in China in 1982 showed that the prevalence of moderate and severe cases was 3.33 ‰, and there is no data on the prevalence of mild patients. The prevalence rates reported outside are higher in rural areas than in urban areas, and higher in males than females.

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