Effects of bilingual language experience on basal ganglia computations: A dynamic causal modeling test of the conditional routing model.

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ID: 25912
2019
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Abstract
Bilingual language control is characterized by the ability to select from amongst competing representations based on the current language in use. According to the Conditional Routing Model (CRM), this feat is underpinned by basal-ganglia signal-routing mechanisms, and may have implications for cognitive flexibility. The current experiment used dynamic causal modeling of fMRI data to compare network-level brain functioning in monolinguals and bilinguals during a task that required productive (semantic decision) and receptive (language) switches. Consistent with the CRM, results showed that: (1) both switch types drove activation in the basal ganglia, (2) bilinguals and monolinguals differed in the strength of influence of dorsolateral prefrontal cortex (DLPFC) on basal ganglia, and (3) differences in bilingual language experience were marginally related to the strength of influence of the switching drives onto basal ganglia. Additionally, a task-by-group interaction was found, suggesting that when bilinguals engaged in language-switching, their task-switching costs were reduced.
Reference Key
yamasaki2019effectsbrain Use this key to autocite in the manuscript while using SciMatic Manuscript Manager or Thesis Manager
Authors Yamasaki, Brianna L;Stocco, Andrea;Liu, Allison S;Prat, Chantel S;
Journal brain and language
Year 2019
DOI
S0093-934X(18)30310-9
URL
Keywords Keywords not found

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