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Screen Time and the Developing Brain: A Systematic Review of Neuroimaging Findings in Children Aged 0-12 Years
1Faculty of Science and Health, School of Dentistry and Medical Sciences, Charles Sturt University, Wagga Wagga, New South Wales, Australia.
Insights
Screen time impacts child brain development, with excessive use linked to poorer outcomes. However, structured digital activities may offer cognitive benefits, highlighting the complex relationship between screen use and neurodevelopment.
Area of Science:
- Neuroscience
- Developmental Psychology
- Pediatrics
Background:
- Screen-based technology use is pervasive among children.
- Understanding its effects on developing brains is crucial for public health.
- Existing research presents mixed findings on screen time's neurodevelopmental impact.
Purpose of the Study:
- To review neuroimaging studies on screen time and brain development in children aged 0-12 years.
- To synthesize evidence on the associations between screen exposure and neurodevelopmental outcomes.
- To explore potential moderators of screen time's effects, such as type and context of use.
Main Methods:
- Scoping review of neuroimaging literature.
- Inclusion of nine studies examining screen-based technology use.
- Analysis of associations between screen exposure and brain structure, function, and behavior.
Main Results:
- Higher screen exposure linked to reduced cortical thickness, white/gray matter integrity, and altered brain connectivity.
- Neural differences associated with poorer literacy, language, emotional regulation, and increased behavioral issues.
- Positive effects observed with structured, interactive digital activities (e.g., video gaming) on cognitive functions and brain volume.
Conclusions:
- Screen time's impact on child brain development is complex and context-dependent.
- Excessive or unregulated screen use may negatively affect neurodevelopment.
- Targeted digital engagement may support specific cognitive functions, warranting further research into causal pathways.
Abstract:
This scoping review examined neuroimaging evidence relating screen-based technology use to brain development in children aged 0-12 years. Nine studies were included. Most reported associations between higher screen exposure and less favorable neurodevelopmental outcomes, including reduced cortical thickness, lower gray and white matter integrity, decreased cerebellar volume, and altered connectivity in networks involved in language, attention, executive functioning, and emotional regulation. These neural differences were associated with poorer literacy and language skills, increased anxiety and depressive symptoms, and greater behavioral difficulties. Some evidence suggested positive effects from structured and interactive digital activities, particularly video gaming, which was linked to improvements in working memory, spatial awareness, fine motor performance, and increased regional brain volume. Findings indicate that the impact of screen-based technology is complex and may depend on the type, duration, and context of use. While excessive or unregulated screen exposure appears associated with less favorable developmental outcomes, targeted digital engagement may support specific cognitive functions. Further longitudinal and experimental research is needed to clarify causal pathways and guide evidence-based recommendations for children's digital media use.
