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FMRI in Localization of Language Areas in Bilinguals

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Author(s): A. Bryll | Andrzej Urbanik | M. Binder

Journal: Iranian Journal of Radiology
ISSN 1735-1065

Volume: 8;
Issue: S1;
Start page: 81;
Date: 2011;
Original page

Keywords: Keyword

ABSTRACT
Background/Objective: The aim of the present study"nwas the estimation of localization differences during"nspeech production in native (LI) and foreign (L2)"nlanguage, and the influence of age of acquisition and proficiency level on activation patterns of language"nareas."nPatients and Methods: Sixty-four volunteers with"ndifferent ages of acquisition and proficiency levels of"nthe foreign language participated in the experiment."nBlock design method, with sentence production as"nthe experimental task, and silence as the control task,"nwas used with 1.5T MR system. Data analysis was"nperformed by SPM2."nResults: It was demonstrated that speech production"nin LI and L2 activated similar cortical areas. In global"nresults, there was a more extensive activation of the"nleft inferior frontal gyrus in L2. In the high proficiency"ngroups, there was a stronger activation in the left"ninferior and middle frontal gyrus in L2. The low"nproficiency groups showed differentiated patterns of"ncortical activation."nConclusion: In the present study, it was shown"nthat similar cortical areas were active during speech"nproduction in the native and foreign language, while"ndifferences in the foreign language included stronger"nactivation of the left inferior frontal gyrus in L2, which"nis involved in phonological processing and plays a role"nin the working memory. Both age of acquisition and"nproficiency level of the second language influences the"npattern of activation of language areas.
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