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White-matter development is different in bilingual and monolingual children : a longitudinal DTI study

(2015) PLOS ONE. 10(2).
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The integrative neuroscience of behavioral control (Neuroscience)
Abstract
Although numerous people grow up speaking more than one language, the impact of bilingualism on brain developing neuroanatomy is still poorly understood. This study aimed to determine whether the changes in the mean fractional-anisotropy (MFA) of language pathways are different between bilingual and monolingual children. Simultaneous-bilinguals, sequential-bilinguals and monolingual, male and female 10-13 years old children participated in this longitudinal study over a period of two years. We used diffusion tensor tractography to obtain mean fractional-anisotropy values of four language related pathways and one control bundle: 1-left-inferior-occipitofrontal fasciculus/IIFOF, 2-left-arcuate fasciculus/IAF/ISLF, 3-bundle arising from the anterior part of corpus-callosum and projecting to orbital lobe/AC-OL, 4-fibres emerging from anterior-midbody of corpus-callosum (CC) to motor cortices/AMB-PMC, 5-right-inferior-occipitofrontal fasciculus rIFOF as the control pathway unrelated to language. These values and their rate of change were compared between 3 groups. FA-values did not change significantly over two years for IAF/ISLF and AC-OL. Sequential- bilinguals had the highest degree of change in the MFA value of IIFOF, and AMBPMC did not present significant group differences. The comparison of MFA of IIFOF yielded a significantly higher FA-value in simultaneous bilinguals compared to monolinguals. These findings acknowledge the existing difference of the development of the semantic processing specific pathway between children with different semantic processing procedure. These also support the hypothesis that age of second language acquisition affects the maturation and myelination of some language specific white-matter pathways.
Keywords
DTI study, children, White-matter development, monolingual, bilingual, CORPUS-CALLOSUM, HUMAN BRAIN, LANGUAGE LATERALIZATION, MAGNETIC-RESONANCE, ARCUATE FASCICULUS, PROCESSING SPEED, PROBABILISTIC TRACTOGRAPHY, ORBITOFRONTAL CORTEX, COGNITIVE CONTROL, FIBER TRACKING

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Citation

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Chicago
Mohades, Seyede Ghazel, Peter Van Schuerbeek, Yves Rosseel, Piet Van De Craen, Robert Luypaert, and Chris Baeken. 2015. “White-matter Development Is Different in Bilingual and Monolingual Children : a Longitudinal DTI Study.” Plos One 10 (2).
APA
Mohades, Seyede Ghazel, Van Schuerbeek, P., Rosseel, Y., Van De Craen, P., Luypaert, R., & Baeken, C. (2015). White-matter development is different in bilingual and monolingual children : a longitudinal DTI study. PLOS ONE, 10(2).
Vancouver
1.
Mohades SG, Van Schuerbeek P, Rosseel Y, Van De Craen P, Luypaert R, Baeken C. White-matter development is different in bilingual and monolingual children : a longitudinal DTI study. PLOS ONE. 2015;10(2).
MLA
Mohades, Seyede Ghazel, Peter Van Schuerbeek, Yves Rosseel, et al. “White-matter Development Is Different in Bilingual and Monolingual Children : a Longitudinal DTI Study.” PLOS ONE 10.2 (2015): n. pag. Print.
@article{5863210,
  abstract     = {Although numerous people grow up speaking more than one language, the impact of bilingualism on brain developing neuroanatomy is still poorly understood. This study aimed to determine whether the changes in the mean fractional-anisotropy (MFA) of language pathways are different between bilingual and monolingual children. Simultaneous-bilinguals, sequential-bilinguals and monolingual, male and female 10-13 years old children participated in this longitudinal study over a period of two years. We used diffusion tensor tractography to obtain mean fractional-anisotropy values of four language related pathways and one control bundle: 1-left-inferior-occipitofrontal fasciculus/IIFOF, 2-left-arcuate fasciculus/IAF/ISLF, 3-bundle arising from the anterior part of corpus-callosum and projecting to orbital lobe/AC-OL, 4-fibres emerging from anterior-midbody of corpus-callosum (CC) to motor cortices/AMB-PMC, 5-right-inferior-occipitofrontal fasciculus rIFOF as the control pathway unrelated to language. These values and their rate of change were compared between 3 groups. FA-values did not change significantly over two years for IAF/ISLF and AC-OL. Sequential- bilinguals had the highest degree of change in the MFA value of IIFOF, and AMBPMC did not present significant group differences. The comparison of MFA of IIFOF yielded a significantly higher FA-value in simultaneous bilinguals compared to monolinguals. These findings acknowledge the existing difference of the development of the semantic processing specific pathway between children with different semantic processing procedure. These also support the hypothesis that age of second language acquisition affects the maturation and myelination of some language specific white-matter pathways.},
  articleno    = {e0117968},
  author       = {Mohades, Seyede Ghazel and Van Schuerbeek, Peter and Rosseel, Yves and Van De Craen, Piet and Luypaert, Robert and Baeken, Chris},
  issn         = {1932-6203},
  journal      = {PLOS ONE},
  language     = {eng},
  number       = {2},
  pages        = {16},
  title        = {White-matter development is different in bilingual and monolingual children : a longitudinal DTI study},
  url          = {http://dx.doi.org/10.1371/journal.pone.0117968},
  volume       = {10},
  year         = {2015},
}

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