Environmental predominance on brain structure and connectivity in language-related regions: a multimodal twin study in adolescence

Language alterations are recognized as early markers of psychopathological vulnerability, yet genetic and environmental factors underlying language-related brain regions remain unknown. We applied univariate twin analyses and risk-discordant comparisons to multimodal dataset from 31 healthy twin pairs (9-31 years) and 17 pairs discordant for psychopathological risk (10-27 years). Gray matter volume (GMV), cortical thickness (CT), and functional interactions, specifically effective connectivity (EC), were assessed in eight bilateral language-related regions, alongside linguistic, emotional-beha

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