Social media use and early adolescent brain structure: Findings from the Adolescent Brain Cognitive Development...

Area of Science:

• Neuroscience
• Adolescent Development
• Neuroimaging

Background:

• Early adolescence is a critical period for social media initiation and neurodevelopment.
• Limited research exists on the neurodevelopmental impact of early social media engagement.
• The Adolescent Brain and Cognitive Development (ABCD) Study provides a valuable dataset for this investigation.

Purpose of the Study:

• To investigate the association between social media usage and addiction with brain morphology in early adolescence.
• To analyze neuroimaging data from a large, nationwide cohort of adolescents.
• To identify specific brain regions potentially affected by social media habits.

Main Methods:

• Utilized structural MRI data from 7,614 adolescents (ages 10-13) from the ABCD Study.
• Analyzed average daily social media use (hours) and social media addiction scores.
• Employed region-of-interest (ROI) and vertexwise analysis (FEMA) for brain morphology assessment.

Main Results:

• Higher average daily social media use was significantly associated with lower total cortical thickness and volume.
• Both social media use and addiction showed associations with reduced cortical thickness in widespread brain regions, including prefrontal, temporal, occipital, and parietal lobes.
• These affected regions overlap with networks involved in executive function, default mode, and visual processing.
• Social media addiction alone did not show significant associations with brain morphology differences in ROI analysis.

Conclusions:

• Increased social media usage in early adolescence is associated with variations in cortical morphology.
• The findings highlight potential neurodevelopmental correlates of social media habits.
• Further research is necessary to determine the causal relationship and directionality of these associations.