Bilingual individuals need effective mechanisms to prevent interference from one language while processing material in the other1. Here we show, using event-related brain potentials and functional magnetic resonance imaging (fMRI), that words from the non-target language are rejected at an early stage before semantic analysis in bilinguals. Bilingual Spanish/Catalan and monolingual Spanish subjects were instructed to press a button when presented with words in one language, while ignoring words in the other language and pseudowords. The brain potentials of bilingual subjects in response to words of the non-target language were not sensitive to word frequency, indicating that the meaning of non-target words was not accessed in bilinguals. The fMRI activation patterns of bilinguals included a number of areas previously implicated in phonological and pseudoword processing2,3,4,5, suggesting that bilinguals use an indirect phonological access route to the lexicon of the target language to avoid interference6.
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Penfield, W. & Roberts, L. Speech and Brain Mechanisms (Princeton Univ. Press, Princeton, New Jersey, 1959).
Demonet, J. F. et al. The anatomy of phonological and semantic processing in normal subjects. Brain 115, 1753–1768 (1992).
Zatorre, R. J., Evans, A. C., Meyer, E. & Gjedde, A. Lateralisation of phonetic and pitch discrimination in speech processing. Science 256, 846–849 (1992).
Paulesu, E., Frith, C. & Frackowiak, R. The neural correlates of the verbal component of working memory. Nature 362, 342–345 (1993).
Petersen, S., Fox, P., Posner, M., Mintun, M. & Raichle, M. Positron emission tomographic studies of the processing of single words. J. Cogn. Neurosci. 1, 153–170 (1989).
Coltheart, M., Curtis, B., Atkins, P. & Haller, M. Models of reading aloud: dual-route and parallel-distributed processing approaches. Psychol. Rev. 100, 589–608 (1993).
Chee, M. W. L. et al. Processing of visually presented sentences in Mandarin and English studied with fMRI. Neuron 23, 127–137 (1999).
Perani, D. et al. The bilingual brain-proficiency and age of acquisition of the second language. Brain 121, 1841–1852 (1998).
Scarborough, D. L., Gerard, L. & Cortese, C. Independence of lexical access in bilingual word recognition. J. Verb. Learn. Verb. Behav. 23, 84–99 (1984).
Macnamara, J. & Kushnir, S. Linguistic independence of bilinguals: the input switch. J. Verb. Learn. Verb. Behav. 10, 480–487 (1971).
Gerad, L. D. & Scarborough, D. L. Language-specific lexical access of homographs by bilinguals. J. Exp. Psychol. Learn. Mem. Cogn. 15, 305–313 (1989).
Dijkstra, T., Timmermans, M. & Schriefers, H. On being blinded by your other language: effects of task demands on interlingual homograph recognition. J. Mem. Lang. 42, 445–464 (2000).
Comrie, B. The World's Major Languages (Croom Helm, London, 1987).
Schmitt, B. M., Münte, T. F. & Kutas, M. Electrophysiological estimates of the time course of semantic and phonological encoding during implicit picture naming. Psychophysiology 37, 473–384 (2000).
Kutas, M. & Hillyard, S. A. Reading senseless sentences: brain potentials reflect semantic incongruity. Science 207, 203–205 (1980).
Rugg, M. D. Event-related brain potentials dissociate repetition effects of high- and low-frequency words. Mem. Cogn. 18, 367–379 (1990).
Nobre, A. & McCarthy, G. Language-related fields potentials in the anterior-medial temporal lobe: II. Effects of word type and semantic priming. J. Neurosci. 15, 1090–1098 (1995).
Luck, S. J., Vogel, E. K. & Shapiro, K. L. Word meanings can be accessed but not reported during the attentional blink. Nature 383, 616–618 (1996).
Petersen, S. E., Fox, P. T., Posner, M. I., Mintum, M. & Raichle, M. E. Positron emission tomographic studies of the cortical anatomy of single word processing. Nature 331, 585–589 (1988).
Xu, B. et al. Conjoint and extended neural networks for the computation of speech codes: the neural basis of selective impairment in reading words and pseudowords. Cerebral Cortex 11, 267–277 (2001).
Bunge, S. A., Ochsner, K. N., Desmond, J. E., Glover, G. H. & Gabrieli, J. D. Prefrontal regions involved in keeping information in and out of mind. Brain 124, 2074–2086 (2001).
Thompson-Schill, S. L., D'Esposito, M. & Kan, I. P. Effects of repetition and competition on activity in the left prefrontal cortex during word generation. Neuron 23, 513–522 (1999).
MacDonald, A. W., Cohen, J. D., Stenger, V. A. & Carter, C. S. Dissociating the role of the dorsolateral prefrontal and anterior cingulate cortex in cognitive control. Science 288, 1835–1838 (2000).
Weber-Fox, C. & Neville, H. Maturational constraints on functional specializations for language processing: ERP and behavioral evidence in bilingual speakers. J. Cogn. Neurosci. 8, 231–256 (1997).
Alameda, J. R. & Cuetos, F. Diccionario de Frecuencias de las Unidades Linguisticas del Castellano (Servicio de Publicaciones Universidad de Oviedo, Oviedo, 1995).
Rafel i Fontanals, J. Diccionari de Freqüencies (Institut d’Estudis Catalans, Barcelona, 1998).
Winer, B. J., Brown, D. R. & Michels, K. M. Statistical Principles in Experimental Designs (McGraw-Hill, New York, 1991).
Friston, K. J. et al. Event-related fMRI: characterizing differential responses. Neuroimage 7, 30–40 (1998).
Cocosco, C. A., Kollokian, V., Kwan, R. K. S. & Evans, A. C. BrainWeb: online interface to a 3D MRI simulated brain database. Neuroimage 5, S425 (1997).
Talairach, J. & Tournoux, P. Co-planar Stereotaxic Atlas of the Human Brain (Thieme Medical, New York, 1988).
This work was supported by grants from the Deutsche Forschungsgemeinschaft and the Spanish government.
The authors declare no competing financial interests.
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Rodriguez-Fornells, A., Rotte, M., Heinze, H. et al. Brain potential and functional MRI evidence for how to handle two languages with one brain. Nature 415, 1026–1029 (2002). https://doi.org/10.1038/4151026a
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