A recent study reveals the significant impact of neighborhood socioeconomics on preteen brain development. Published in the journal Science, the research highlights that socioeconomic factors such as household income, education level, and neighborhood quality can visibly affect brain structure, as observed through MRI scans.
The study evaluated over 2,300 children aged 9 and 10. It discovered that those from lower-income neighborhoods with limited social support exhibited brain differences. These differences related to reduced sleep and increased stress levels.
Something is going on in these neighborhoods. We need to find out how socioeconomics is becoming biologically embedded,said Scott Marek, the first author and assistant professor of radiology at WashU School of Medicine.
Russell Poldrack, a psychology professor at Stanford University, noted that the findings emphasize the substantial effects of growing up in varied environments. The research challenges earlier studies that focused solely on factors like IQ or mental health in brain development. According to Dr. Nico Dosenbach, another author of the study, socioeconomic status is a more critical influence.
Dr. Theodore D. Satterthwaite, an associate professor at the University of Pennsylvania Perelman School of Medicine, suggests that past studies might require reassessment. These studies didn’t include socioeconomics in their analysis, which might alter previous conclusions.
This new research is part of a growing body of work focusing on environmental influences on childhood brain development. Using data from the Adolescent Brain Cognitive Development (ABCD) Study, the researchers assessed various factors affecting brain structure and communication networks.
The analysis showed that socioeconomic-related factors had the strongest association with brain differences, particularly in areas responsible for sensory processing and motor control. Higher brain functions like attention and memory showed fewer associations.
The study team investigated how factors such as income, preschool enrollment, healthcare access, and neighborhood quality could influence brain development. It was noted that brain circuits responsible for wakefulness and alertness undergo alterations due to insufficient sleep, increased stress, or excessive social media use.
These environmental factors are more common in communities lacking in economic, educational, and social opportunities. While the study does not establish causation, Marek emphasizes the need to explore connections between sleep, stress, and screen time to understand these brain differences.