Children with richer parents have larger brains compared to children with poorer parents, according to a new study. The differences in the brain were most marked in the areas that control language, reading, decision making and memory, the study found.
Noble et al., 2015 - Family income, parental education and brain structure in children and adolescents.
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However, researchers from California also found that community help and teaching can help remedy the disparities found in poorer children. They concluded that factors such as better school lunches and teachers that were motivated can actually have a significant impact on the brain development of these children.
For the study, which claims to be the largest of its kind, researchers from the University of Southern California tested 1,099 people that were developing, both male and female, between the ages of 3 and 20. They measured brain surface area by scans and conducted cognitive test, then compared them to the income levels of their parents, correcting for other potential influences on brain structure, such as genetic characteristics.
Scientists found that not only were there differences between the richest and the poorest, but there were also marked variations at the lower end of the scale. There was a bigger difference between the results of families earning $30,000 and $50,000 a year than there was between $90,000 and $110,000.
Report co-author Elizabeth Sowell said, "It seems reasonable to speculate that resources afforded by the more affluent, such as nutrition, childcare, schools, help 'wire' the brain through development. It is not too late to think about how to impact resources that enrich the developmental environment that in turn help the brain wire itself together."