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Titolo:
Language switching and language representation in Spanish-English bilinguals: An fMRI study
Autore:
Hernandez, AE; Dapretto, M; Mazziotta, J; Bookheimer, S;
Indirizzi:
Univ Calif Santa Barbara, Dept Psychol, Santa Barbara, CA 93106 USA Univ Calif Santa Barbara Santa Barbara CA USA 93106 Barbara, CA 93106 USA Univ Calif Los Angeles, Los Angeles, CA USA Univ Calif Los Angeles Los Angeles CA USA s Angeles, Los Angeles, CA USA
Titolo Testata:
NEUROIMAGE
fascicolo: 2, volume: 14, anno: 2001,
pagine: 510 - 520
SICI:
1053-8119(200108)14:2<510:LSALRI>2.0.ZU;2-4
Fonte:
ISI
Lingua:
ENG
Soggetto:
SELECTIVE DEFICIT; 2ND LANGUAGE; BRAIN; CHILDREN; ACTIVATION; PET; RETRIEVAL; CORTEX; NOUNS; VERBS;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Life Sciences
Citazioni:
55
Recensione:
Indirizzi per estratti:
Indirizzo: Hernandez, AE Univ Calif Santa Barbara, Dept Psychol, Santa Barbara, CA 93106 USA Univ Calif Santa Barbara Santa Barbara CA USA 93106 106 USA
Citazione:
A.E. Hernandez et al., "Language switching and language representation in Spanish-English bilinguals: An fMRI study", NEUROIMAGE, 14(2), 2001, pp. 510-520

Abstract

The current experiment was designed to investigate the nature of cognitivecontrol in within- and between-language switching in bilingual participants. To examine the neural substrate of language switching we used functionalmagnetic resonance imaging (fMRI) as subjects named pictures in one language only or switched between languages. Participants were also asked to name(only in English) a separate set of pictures as either the actions or the objects depicted or to switch between these two types of responses on each subsequent picture. Picture naming compared to rest revealed activation in the dorsolateral prefrontal cortex, which extended down into Broca's area in the left hemisphere. There were no differences in the activation pattern for each language. English and Spanish both activated overlapping areas of the brain. Similarly, there was no difference in activation for naming actions or objects in English. However, there was increased intensity of activation in the dorsolateral prefrontal cortex for switching between languages relative to no-switching, an effect which was not observed for naming of actions or objects in English. We suggest that the dorsolateral prefrontal cortex serves to attenuate interference that results from having to actively enhance and suppress two languages in alternation. These results are consistent with the view that switching between languages involves increased general executive processing. Finally, our results are consistent with the viewthat different languages are represented in overlapping areas the brain inearly bilinguals. (C) 2001 Academic Press.

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Documento generato il 21/01/20 alle ore 07:03:41