Imbecility is an average oligophrenia extent (mental retardation). Defect of mental development congenital or is acquired in the early childhood, during life it doesn’t increase.

The reasons of an imbecility are caused with disorder within pregnancy period of mother (animal protein malnutrition, smoking, infections, radiation), fetus injuries during [...]


Idiocy is the most expressed extent of congenital or acquired in the early childhood intellectual retardation (oligophrenia). Defect of mental development doesn’t increase in the subsequent life.

Disorders in development of nervous system arise during intrauterine growth period or in the first months of child life. Injury of [...]