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American Focus > Blog > Tech and Science > Addiction Risk Shows up in Children’s Brain Scans before Drug Use Starts
Tech and Science

Addiction Risk Shows up in Children’s Brain Scans before Drug Use Starts

Last updated: July 7, 2025 1:25 pm
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Addiction Risk Shows up in Children’s Brain Scans before Drug Use Starts
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A groundbreaking study has shed new light on addiction and the brain, challenging the traditional narrative that substance use leads to brain damage. The research, part of a larger project monitoring the brains of 10,000 children as they grow, revealed that brain differences in individuals who experimented with drugs early in life were present even before they took their first puff or sip.

Published in December 2024 in JAMA Network Open, the study is part of the Adolescent Brain Cognitive Development initiative led by the National Institute on Drug Abuse (NIDA). The findings suggest that there are preexisting brain vulnerabilities in teenagers who start using drugs at a young age. These vulnerabilities manifest as enlargements in various brain regions and an overall larger brain size compared to those who do not use drugs.

Lead author Alex Miller, an assistant professor of psychiatry at Indiana University School of Medicine, explained that children who began using drugs during the study period already had these brain differences before their drug use started. The study also found that these individuals had a larger surface area in the outer cortex of the brain, with more folds and grooves.

While a bulkier and more heavily creased brain is often associated with higher intelligence, the study emphasized that brain size differences are not the sole determinant of intelligence. Interestingly, some of the brain variances identified in the study were linked to personality traits such as curiosity, risk-taking, and openness to experience.

The research highlighted that early brain differences associated with drug initiation may be influenced by genetic variations or childhood exposure to adverse experiences. While substance use can potentially impact brain development and contribute to addiction risk, the study suggests that there are underlying factors at play.

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Moreover, the study indicated that early brain differences can be targeted to enhance prevention programs. A recent trial demonstrated that personality-based interventions in adolescents with high-risk traits can significantly reduce the likelihood of developing substance use disorders. By identifying and addressing these risky traits through cognitive skills training, researchers were able to achieve a substantial reduction in substance use disorders among participants.

Ultimately, the study underscores the importance of understanding the complex interplay between brain development, personality traits, and substance use in adolescents. By identifying early vulnerabilities and implementing targeted interventions, we can empower young individuals to make healthier choices and mitigate the risks associated with drug experimentation.

TAGGED:AddictionbrainchildrensDrugRiskscansShowsStarts
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