ADHD( Attention deficit hyperactivity disorder) and social deprivation

The current emerging research has suggested that infants and children who are raised in an environment of psychosocial neglect , the cortical development in them has slowed down and in turn leads to ADHD. added to that the University of Washington's research on children who have began life in an overcrowded orphanages in Romania have showed changes in brain structure due to early childhood neglect, subsequently a paper which was published in the journal " Biological Psychiatry" found that children who spent their early years in these institution's have thinner tissues of brain in some areas and those brain areas of reduced cortical mass correspond to impulse control and attention 

According to Dr. Katie McLaughlin, university of Washington " the differences suggests a way that the early care environment has dramatic and lasting effects for children's functioning" 

The Bucharest Early intervention Project was first to document and treat the children's health for about fourteen years and showed how social deprivation in early life affects the thickness of the cortex(folded layer of gray matter that forms the outer layer of the brain ) and according to McLaughlin, the pervasive pattern of differences  in the areas of brain is related to attention, working memory and social cognition and it is known that children raised in such institutions tend to have ADHD or attention deficit hyperactivity disorder, about four to five times more often that other children

Source : http://psychcentral.com/