Bilingual aphasia and language control: A follow-up fMRI and intrinsic connectivity study

Abutalebi, Jubin; Rosa, Pasquale Anthony Della; Tettamanti, Marco; Green, David W.; Cappa, Stefano F.

doi:10.1016/j.bandl.2009.03.003

Cited by 141 publications

(146 citation statements)

References 54 publications

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“…An fMRI connectivity study examining language recovery in a clinical population further demonstrated a strong connection between cingulate and dorsolateral prefrontal cortex and the connectivity studies suggest that these areas work together to inhibit interference from the non-target language. The cingulate serves to signal the prefrontal cortex of potential response conflicts and the prefrontal cortex seeks to avoid incorrect selection (Abutalebi, et al, 2009). Our finding of a very early cingulate response in the L2 condition supports this idea that the cingulate signals the possibility of response conflicts which is later responded to by the dorsolateral cortex.…”

Section: Discussionsupporting

confidence: 79%

An MEG study of the spatiotemporal dynamics of bilingual verb generation

Pang

MacDonald

2012

Brain Research

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Studies of first (L1) and second (L2) language representation in the brain have not identified the timing and locations of neural regions involved in L1 and L2 processing. Magnetoencephalography offers high spatial and temporal resolution and can be employed to disentangle subtle timing and neural control differences between L1 and L2 use. We tested bilingual adults in the MEG as they completed a picture verb generation task in L1 and L2. We found the expected progression of activation from occipital to temporal to inferior frontal areas. We also observed the following differences. A sustained insula and early cingulate event-related desynchrony was observed only with L2; the fMRI literature suggests that the former reflects an activation, and the latter an inhibition, sub-process for language selection. L2 processes exhibited a lag and were bilateral compared to L1 processes. Finally, L1 and L2 activated adjacent language control in dorsolateral pre-frontal cortex.

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Section: Discussionsupporting

confidence: 79%

An MEG study of the spatiotemporal dynamics of bilingual verb generation

Pang

MacDonald

2012

Brain Research

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“…picture naming) in a mixed-language context and in a single-language (monolingual) context, and brain activity has been shown to be higher for the mixed-language context in a cortical-subcortical network of brain regions that is bilateral, but predominantly left-lateralized, and includes inferior and middle frontal gyrus, precentral gyrus, supplementary motor area (SMA), caudate, anterior cingulate cortex (ACC), and supramarginal gyrus (SMG). It has been proposed that this predominantly frontal cortical-subcortical network plays a crucial role in bilingual language control (Abutalebi & Green, 2008;Luk et al, 2011), and further support of this hypothesis has come from studies of bilingual aphasia (e.g., Aglioti & Fabbro, 1993;Abutalebi, Della Rosa, Tettamanti, Green, & Cappa, 2009;Abutalebi, Miozzo, & Cappa, 2000;Kho et al, 2007), intracranial stimulation (e.g., Moritz-Gasser & Duffau, 2009), and transcranial magnetic stimulation studies (for review, see Hervais-Adelman, Moser-Mercer, & Golestani, 2011). However, it is known that most of the areas in this cortical-subcortical network are also involved in task switching (e.g.…”

Section: Introductionmentioning

confidence: 88%

Cognitive control of language production in bilinguals involves a partly independent process within the domain-general cognitive control network: Evidence from task-switching and electrical brain activity

et al. 2012

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In highly proficient, early bilinguals, behavioural studies of the cost of switching language or task suggest qualitative differences between language control and domain-general cognitive control. By contrast, several neuroimaging studies have shown an overlap of the brain areas involved in language control and domain-general cognitive control. The current study measured both behavioural responses and eventrelated potentials (ERPs) from bilinguals who performed picture naming in single-or mixed-language contexts, as well as an alphanumeric categorisation task in single-or mixed-task context. Analysis of switch costs during the mixed-context conditions showed qualitative differences between language control and domain-general cognitive control. A 2 Â 2 ANOVA of the ERPs, with domain (linguistic, alphanumeric) and context (single, mixed) as within-participant factors, revealed a significant interaction, which also suggests a partly independent language-control mechanism. Source estimations revealed the neural basis of this mechanism to be in bilateral frontal-temporal areas.

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“…The evidence from both lesion studies (for example Abutalebi et al, 2000Abutalebi et al, , 2009 and functional imaging of bilingual language control (Abutalebi and Green, 2008;Garbin et al, 2010;Klein et al, 1994Klein et al, , 1995Klein et al, , 2006Lehtonen et al, 2005;Price et al, 1999) has tended to suggest that this function of the basal ganglia is left-lateralized. However, a meta-analysis of neuroimaging studies of language switching indicates that both right and left striatal structures are implicated in language switching .…”

Section: Discussionmentioning

confidence: 99%

Brain functional plasticity associated with the emergence of expertise in extreme language control

2015

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We used functional magnetic resonance imaging (fMRI) to longitudinally examine brain plasticity arising from long-term, intensive simultaneous interpretation training. Simultaneous interpretation is a bilingual task with heavy executive control demands. We compared brain responses observed during simultaneous interpretation with those observed during simultaneous speech repetition (shadowing) in a group of trainee simultaneous interpreters, at the beginning and at the end of their professional training program. Age, sex and languageproficiency matched controls were scanned at similar intervals. Using multivariate pattern classification, we found distributed patterns of changes in functional responses from the first to second scan that distinguished the interpreters from the controls. We also found reduced recruitment of the right caudate nucleus during simultaneous interpretation as a result of training. Such practice-related change is consistent with decreased demands on multilingual language control as the task becomes more automatized with practice. These results demonstrate the impact of simultaneous interpretation training on the brain functional response in a cerebral structure that is not specifically linguistic, but that is known to be involved in learning, in motor control, and in a variety of domain-general executive functions. Along with results of recent studies showing functional and structural adaptations in the caudate nuclei of experts in a broad range of domains, our results underline the importance of this structure as a central node in expertise-related networks.

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Bilingual aphasia and language control: A follow-up fMRI and intrinsic connectivity study

Cited by 141 publications

References 54 publications

An MEG study of the spatiotemporal dynamics of bilingual verb generation

An MEG study of the spatiotemporal dynamics of bilingual verb generation

Cognitive control of language production in bilinguals involves a partly independent process within the domain-general cognitive control network: Evidence from task-switching and electrical brain activity

Brain functional plasticity associated with the emergence of expertise in extreme language control

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