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Bilingualism at the core of the brain. Structural differences between bilinguals and monolinguals revealed by subcortical shape analysis

dc.contributor.authorBurgaleta, Miguel
dc.contributor.authorSanjuán Tomás, Ana
dc.contributor.authorVentura Campos, Mercedes
dc.contributor.authorSebastián Gallés, Nuria
dc.contributor.authorAvila, Cesar
dc.date.accessioned2016-06-01T09:49:35Z
dc.date.available2016-06-01T09:49:35Z
dc.date.issued2015
dc.identifier.citationBURGALETA, Miguel, et al. Bilingualism at the core of the brain. Structural differences between bilinguals and monolinguals revealed by subcortical shape analysis. NeuroImage, 2016, vol. 125, p. 437-445.ca_CA
dc.identifier.issn1053-8119
dc.identifier.urihttp://hdl.handle.net/10234/160175
dc.descriptionNaturally acquiring a language shapes the human brain through a long-lasting learning and practice process. This is supported by previous studies showing that managing more than one language from early childhood has an impact on brain structure and function. However, to what extent bilingual individuals present neuroanatomical peculiarities at the subcortical level with respect to monolinguals is yet not well understood, despite the key role of subcortical gray matter for a number of language functions, including monitoring of speech production and language control — two processes especially solicited by bilinguals. Here we addressed this issue by performing a subcortical surface-based analysis in a sample of monolinguals and simultaneous bilinguals (N = 88) that only differed in their language experience from birth. This analysis allowed us to study with great anatomical precision the potential differences in morphology of key subcortical structures, namely, the caudate, accumbens, putamen, globus pallidus and thalamus. Vertexwise analyses revealed significantly expanded subcortical structures for bilinguals compared to monolinguals, localized in bilateral putamen and thalamus, as well as in the left globus pallidus and right caudate nucleus. A topographical interpretation of our results suggests that a more complex phonological system in bilinguals may lead to a greater development of a subcortical brain network involved in monitoring articulatory processes.ca_CA
dc.description.sponsorShipThis work was supported by grants from the Spanish Ministerio de Ciencia e Innovación (JCI-2009-04492, PSI2010-20168), the Spanish Ministerio de Economía y Competitividad (MINECO-PSI2012-34071), the European Community's Seventh Framework Programme (FP7/2007–2013) / ERC grant agreement n°323961, and Grup de Recerca en Neurociència Cognitiva (GRNC), AGAUR (2014 SGR 1210 N). M.B. was funded by the Spanish Ministerio de Economía y Competitividad (MINECO-FPDI-2013-17528). N.S.G. received the prize ICREA Academia for excellence in research, funded by the Generalitat de Catalunya. We thank Albert Costa for his comments on an earlier version of this manuscript.ca_CA
dc.format.mimetypeapplication/pdfca_CA
dc.language.isoengca_CA
dc.publisherElsevierca_CA
dc.relation.isPartOfNeuroImage, 2016, vol. 125ca_CA
dc.rights.urihttp://rightsstatements.org/vocab/CNE/1.0/*
dc.subjectbasal gangliaca_CA
dc.subjectthalamusca_CA
dc.subjectstructural MRIca_CA
dc.subjectneuroanatomyca_CA
dc.subjectbilingualismca_CA
dc.titleBilingualism at the core of the brain. Structural differences between bilinguals and monolinguals revealed by subcortical shape analysisca_CA
dc.typeinfo:eu-repo/semantics/articleca_CA
dc.identifier.doihttp://dx.doi.org/10.1016/j.neuroimage.2015.09.073
dc.rights.accessRightsinfo:eu-repo/semantics/openAccessca_CA
dc.relation.publisherVersionhttp://www.sciencedirect.com/science/article/pii/S1053811915009763ca_CA


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