The Neurodevelopmental Dynamics of Multilingual Experience During Childhood: A Longitudinal Behavioral, Structural,...

Area of Science:

• Neurobiology
• Developmental Neuroscience
• Cognitive Neuroscience

Background:

• A comprehensive neurobiological framework for multilingual development requires longitudinal data, consideration of brain constraints, and assessment of global competence.
• This study investigates early changes in executive attention and related frontal-striatal neural structures due to multilingualism.

Purpose of the Study:

• To examine how multilingual competence influences executive attention control mechanisms.
• To identify early structural and functional brain changes in the frontal-striatal system associated with multilingualism.

Main Methods:

• Longitudinal neuroimaging and functional connectivity analyses were conducted over two years.
• A small cohort of multilingual children participated in the study.

Main Results:

• The dorsal anterior cingulate cortex/pre-supplemental area (dACC/preSMA) showed functional influence from multilingual competence, but not yet structural adaptation.
• The left caudate demonstrated developmental influence, adaptation, and specialization driven by multilingual experiences.
• Increased multilingual competence strengthened functional connections within the cognitive control network, including the dACC/preSMA, left caudate, right inferior frontal gyrus, and bilateral inferior parietal lobules.

Conclusions:

• Multilingual competence significantly impacts brain adaptation and specialization during childhood.
• Findings offer insights into experience-expectant and experience-dependent brain plasticity.
• Results highlight the interaction between multilingualism and neurodevelopment, guiding future research.