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Prenatal brain connectivity and postnatal language: how familial risk and prenatal speech exposure shape early language skills
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Prenatal brain connectivity and postnatal language: how familial risk and prenatal speech exposure shape early language skills
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Journal Article
Prenatal brain connectivity and postnatal language: how familial risk and prenatal speech exposure shape early language skills
2025
Overview
The maturation of the auditory-language brain network begins before birth, driven by gene-environment interactions. We investigated the association between familial and environmental factors and the foetal development of this network, as well as the predictive value of this association for postnatal language outcomes. Using prenatal resting-state fMRI, we examined 25 foetuses to identify functional connectivity within the auditory-language network. Postnatal language was assessed longitudinally between 1 and 3 years using the Bayley-III scale. Familial risk for language disorders and prenatal speech exposure were quantified using a newly developed questionnaire. First, hierarchical clustering on foetal functional connectivity confirmed that an auditory-language network can be identified in the foetal brain. In this network, foetuses with higher speech exposure exhibited increased connectivity between left-hemisphere regions and decreased connectivity between homologous right-hemisphere regions. Higher familial risk was linked to reduced connectivity within the left language network. Regression analyses revealed that prenatal functional connectivity between insula, caudate nucleus, and rolandic operculum significantly predicted postnatal language. These findings underscore the critical role of genetic and environmental influences in functionally shaping the foetal auditory-language network, with lasting impacts on early language development. By integrating prenatal brain connectivity, familial risk, and speech exposure, this study provides new insights into prenatal language neurodevelopment, highlighting its importance for future language capabilities.
Publisher
Nature Publishing Group UK,Nature Publishing Group,Nature Portfolio
Subject
/ Adult
/ Auditory and language networks
/ Brain
/ Female
/ Functional magnetic resonance imaging
/ Genotype-environment interactions
/ Hearing
/ Humanities and Social Sciences
/ Humans
/ Infant
/ Language
/ Language Development Disorders
/ Male
/ Prenatal Exposure Delayed Effects - physiopathology
/ Science
/ Speech
