MENTAL RETARDATION INTRODUCTION In each country approximately 1% of the population have mental retardation. Mental Retardation is a disability, which starts before adulthood, and has a lasting effect on development producing: Reduced ability to cope independently (impaired social functioning) due to Reduced ability to understand new information and to learn new skills (impaired intelligence). The essential features of mental retardation are a significantly sub-average general intellectual function, accompanied by significant deficits in social functioning in areas such as social skills, communication and in addition difficulties in attaining personal independence and social responsibility. The onset of mental retardation must be before the age of 18 years. . CAUSES OF MENTAL RETARDATION Causes of mental retardation are grouped into two, genetic and environmental categories. Ø Problems with brain development intra uterine which may be cause
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