Bilingual experience and resting-state brain connectivity: Impacts of L2 age of acquisition and social diversity of language use on control networks

Jason W. Gullifer, Xiaoqian J. Chai, Veronica Whitford, Irina Pivneva, Shari Baum, Denise Klein, Debra Titone

Research output: Contribution to journalArticle

Abstract

We investigated the independent contributions of second language (L2) age of acquisition (AoA) and social diversity of language use on intrinsic brain organization using seed-based resting-state functional connectivity among highly proficient French-English bilinguals. There were two key findings. First, earlier L2 AoA related to greater interhemispheric functional connectivity between homologous frontal brain regions, and to decreased reliance on proactive executive control in an AX-Continuous Performance Task completed outside the scanner. Second, greater diversity in social language use in daily life related to greater connectivity between the anterior cingulate cortex and the putamen bilaterally, and to increased reliance on proactive control in the same task. These findings suggest that early vs. late L2 AoA links to a specialized neural framework for processing two languages that may engage a specific type of executive control (e.g., reactive control). In contrast, higher vs. lower degrees of diversity in social language use link to a broadly distributed set of brain networks implicated in proactive control and context monitoring.

Original languageEnglish (US)
Pages (from-to)123-134
Number of pages12
JournalNeuropsychologia
Volume117
DOIs
StatePublished - Aug 2018

Keywords

  • Bilingualism
  • Brain imaging
  • Executive control
  • L2 age of acquisition
  • Resting-state functional connectivity
  • Social diversity of language use

ASJC Scopus subject areas

  • Experimental and Cognitive Psychology
  • Cognitive Neuroscience
  • Behavioral Neuroscience

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