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Language and Cognition01:27

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Language serves as a bridge between ideas and communication, influencing how individuals perceive and interact with the world. Psychologists have long debated whether language shapes thought or vice versa. This discussion gained grip with Edward Sapir and Benjamin Lee Whorf in the 1940s, who proposed that language determines thought, a concept known as linguistic determinism. They suggested that the vocabulary and structure of a language influence how its speakers think and perceive reality.
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Co-analysis of Brain Structure and Function using fMRI and Diffusion-weighted Imaging
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Sequential language learning and language immersion in bilingualism: diffusion MRI connectometry reveals

Farzaneh Rahmani1,2, Soheila Sobhani3,4, Mohammad Hadi Aarabi3,4

  • 1NeuroImaging Network (NIN), Universal Scientific Education and Research Network (USERN), Tehran, Iran. farzaneh.rahmani@usern.org.

Experimental Brain Research
|July 14, 2017
PubMed
Summary

Bilingualism enhances brain connectivity, particularly in white matter tracts like the arcuate fasciculus and corpus callosum. Longer immersion periods correlate with increased connectivity, except in the cingulum, suggesting unique adaptations in the bilingual brain.

Keywords:
BilingualismCingulumConnectometryDiffusion MRI

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Area of Science:

  • Neuroscience
  • Cognitive Science
  • Linguistics

Background:

  • Bilingualism is associated with cognitive advantages and distinct brain structures.
  • Diffusion MRI connectometry offers a novel method to analyze white matter tract integrity.

Purpose of the Study:

  • To investigate structural differences in white matter tracts of sequential bilingual adults using diffusion MRI connectometry.
  • To explore the correlation between language immersion duration and white matter connectivity.

Main Methods:

  • Diffusion MRI connectometry was used to analyze white matter tracts in 20 sequential bilingual adults and 25 age-matched controls.
  • Correlation analysis was performed to assess the relationship between immersion period and white matter tract quantitative anisotropy.

Main Results:

  • Sequential bilinguals showed increased connectivity in the corpus callosum (CC), bilateral cingulum, arcuate fasciculus (AF), and left inferior frontooccipital fasciculus (IFOF).
  • Connectivity in CC, AF, and IFOF positively correlated with the duration of second language immersion.
  • The cingulum was identified as a tract with increased connectivity in late bilinguals, independent of immersion duration.

Conclusions:

  • Sequential bilingualism is associated with structural brain differences, particularly in white matter tracts crucial for language processing.
  • The duration of immersion in a second language significantly influences white matter connectivity.
  • The cingulum may represent a distinct neural correlate of late bilingualism.