Article about the disorder of mind

Oligophrenia - congenital or early acquired dementia, resulting in the underdevelopment of the intellect and psyche as a whole. Oligophrenia - not прогредиентный process, as a result of illness. The degree of mental deficiency is estimated quantitatively using the intellectual coefficient on the standard psychological tests. Mental retardation are often accompanied by defects of the physical development.

Etiology. Causes of mental retardation may be:
hereditary factors, including the pathology of the reproductive cells of parents (to this group of mental retardation are a disease Syndrome, true microcephaly, энзимопатические form);
intrauterine defeat of the embryo and fetus (hormonal disorders, rubella and other viral infections, congenital syphilis, toxoplasmosis);
the harmful factors of perinatal period and the first 3 years of life (the fetus and newborn asphyxia, birth trauma, immunological incompatibility of the blood of the mother and fetus - conflict rhesus-factor, head trauma in early childhood, childhood infections, congenital hydrocephalus).