The Bilingual Brain: Cerebral Representation of Languages

The present article deals with theoretical and experimental aspects of language representation in the multilingual brain. Two general approaches were adopted in the study of the bilingual brain. The study of bilingual aphasics allows us to describe dissociations and double dissociations between the different subcomponents of the various languages. Furthermore, symptoms peculiar to bilingual aphasia were reported (pathological mixing and switching and translations disorders) which allowed the correlation of some abilities specific to bilinguals with particular neurofunctional systems. Another approach to the study of the bilingual brain is of the experimental type, such as electrophysiological investigations (electrocorticostimulation during brain surgery and event-related potentials) and functional neuroanatomy studies (positron emission tomography and functional magnetic resonance imaging). Functional neuroanatomy studies investigated the brain representation of languages when processing lexical and syntactic stimuli and short stories. Neurophysiologic and neuroimaging studies evidenced a similar cerebral representation of L1 and L2 lexicons both in early and late bilinguals. The representation of grammatical aspects of languages seems to be different between the two languages if L2 is acquired after the age of 7, with automatic processes and correctness being lower than those of the native language. These results are in line with a greater representation of the two lexicons in the declarative memory systems, whereas morphosyntactic aspects may be organized in different systems according to the acquisition vs learning modality.

[1]  Harry A. Whitaker,et al.  Studies in neurolinguistics , 1976 .

[2]  U. Bellugi,et al.  Neural Systems Mediating American Sign Language: Effects of Sensory Experience and Age of Acquisition , 1997, Brain and Language.

[3]  D. Caplan,et al.  Processing of Visually Presented Sentences in Mandarin and English Studied with fMRI , 1999, Neuron.

[4]  F. Fabbro,et al.  Paradoxical selective recovery in a bilingual aphasic following subcortical lesions. , 1993, Neuroreport.

[5]  Franco Fabbro,et al.  LANGUAGE DISORDERS IN BILINGUAL PATIENTS AFTER THALAMIC LESIONS , 1997, Journal of Neurolinguistics.

[6]  N. Cook,et al.  Homotopic callosal inhibition , 1984, Brain and Language.

[7]  Arturo E. Hernandez,et al.  In Search of the Language Switch: An fMRI Study of Picture Naming in Spanish–English Bilinguals , 2000, Brain and Language.

[8]  H. Neville,et al.  Maturational Constraints on Functional Specializations for Language Processing: ERP and Behavioral Evidence in Bilingual Speakers , 1996, Journal of Cognitive Neuroscience.

[9]  H A Whitaker,et al.  The bilingual brain. , 1978, Archives of neurology.

[10]  M. Posner,et al.  Images of mind , 1994 .

[11]  M. Gopnik,et al.  Compensatory strategies in genetic dysphasia: Declarative memory , 1997, Journal of Neurolinguistics.

[12]  Michel Paradis,et al.  Aspects of bilingual aphasia , 1995 .

[13]  V Bettinardi,et al.  The bilingual brain. Proficiency and age of acquisition of the second language. , 1998, Brain : a journal of neurology.

[14]  J. Hirsch,et al.  Distinct cortical areas associated with native and second languages , 1997, Nature.

[15]  C. Price.  The functional anatomy of word comprehension and production , 1998, Trends in Cognitive Sciences.

[16]  Michel Paradis,et al.  Bilingualism and Aphasia , 1977 .

[17]  A. Beltramello,et al.  Neurolinguistic and follow-up study of an unusual pattern of recovery from bilingual subcortical aphasia. , 1996, Brain : a journal of neurology.

[18]  F. Fabbro.  Bilingual aphasia research is not a tabula rasa , 1998 .

[19]  Michel Paradis,et al.  Readings on aphasia in bilinguals and polyglots , 1983 .

[20]  Leslie G. Ungerleider,et al.  Functional MRI evidence for adult motor cortex plasticity during motor skill learning , 1995, Nature.

[21]  S. Dehaene,et al.  Anatomical variability in the cortical representation of first and second language , 1997, Neuroreport.

[22]  Michel Paradis,et al.  Language lateralization in bilinguals: Enough already! , 1990, Brain and Language.

[23]  C. Price,et al.  A functional imaging study of translation and language switching. , 1999, Brain : a journal of neurology.

[24]  Emmanuel Dupoux,et al.  Brain processing of native and foreign languages. , 1996 .

[25]  M. Chee,et al.  Mandarin and English Single Word Processing Studied with Functional Magnetic Resonance Imaging , 1999, The Journal of Neuroscience.

[26]  J. Cummings,et al.  Bilingualism and dementia. , 1999, The Journal of neuropsychiatry and clinical neurosciences.

[27]  F. Fabbro.  The neurolinguistics of bilingualism , 1999 .

[28]  M. Paradis.  Aphasie et traduction , 1984 .

[29]  D Klein,et al.  Cerebral organization in bilinguals: a PET study of Chinese-English verb generation. , 1999, Neuroreport.

[30]  M. Motta,et al.  Compulsive and paradoxical translation behaviour in a case of presenile dementia of the Alzheimer type , 1988, Journal of Neurolinguistics.

[31]  S. Aglioti,et al.  Pathological switching between languages after frontal lesions in a bilingual patient , 2000, Journal of neurology, neurosurgery, and psychiatry.

[32]  Daniel Gile,et al.  Conference Interpreting: current trends in research , 1997 .

[33]  Prathibha Karanth,et al.  Crossed aphasia in multilinguals , 1988, Brain and Language.

[34]  D. Green.  Control, activation, and resource: A framework and a model for the control of speech in bilinguals , 1986, Brain and Language.

[35]  Michel Paradis,et al.  Language and Communication in Multilinguals , 1998 .

[36]  Franco Fabbro,et al.  Introduction to language and cerebellum , 2000, Journal of Neurolinguistics.

[37]  H. Whitaker,et al.  Language function and dysfunction among Chinese- and English-speaking polyglots: Cortical stimulation, Wada Testing, and clinical studies , 1983, Brain and Language.

[38]  Gary H. Glover,et al.  Convergent Cortical Representation of Semantic Processing in Bilinguals , 1999, Brain and Language.

[39]  Michel Paradis,et al.  Alternate antagonism with paradoxical translation behavior in two bilingual aphasic patients , 1982, Brain and Language.

[40]  S. Pinker,et al.  A Neural Dissociation within Language: Evidence that the Mental Dictionary Is Part of Declarative Memory, and that Grammatical Rules Are Processed by the Procedural System , 1997, Journal of Cognitive Neuroscience.

[41]  H. Neville,et al.  Fractionating language: different neural subsystems with different sensitive periods. , 1992, Cerebral cortex.

[42]  Ellen Bialystok,et al.  Handbook of Neurolinguistics , 1998 .