Behavioral and oscillatory signatures of switch costs in highly proficient bilinguals

Timofeeva, Polina; Quiñones, Ileana; Geng, Shuang; Bruin, Angela de; Carreiras, Manuel; Amoruso, Lucía

doi:10.1038/s41598-023-34895-1

Cited by 3 publications

(1 citation statement)

References 81 publications

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“…These nodes include the middle and superior temporal gyrus, the temporal pole, and the parahippocampal gyrus, which have been widely implicated in lexico-semantic processes, including lexical access and the retrieval of conceptual knowledge from long-term memory. [68][69][70] Moreover, there is evidence indicating that beta rhythms support the reallocation of linguistic functions in bilingual patients with brain damage. 71 Thus, this finding suggests that bilingual experience impacts the topological organization of brain networks dedicated to language-specific functions.…”

Section: Discussionmentioning

confidence: 99%

Decoding bilingualism from resting‐state oscillatory network organization

Amoruso,

García,

Pusil

et al. 2024

Annals of the New York Academy of Sciences

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Can lifelong bilingualism be robustly decoded from intrinsic brain connectivity? Can we determine, using a spectrally resolved approach, the oscillatory networks that better predict dual‐language experience? We recorded resting‐state magnetoencephalographic activity in highly proficient Spanish‐Basque bilinguals and Spanish monolinguals, calculated functional connectivity at canonical frequency bands, and derived topological network properties using graph analysis. These features were fed into a machine learning classifier to establish how robustly they discriminated between the groups. The model showed excellent classification (AUC: 0.91 ± 0.12) between individuals in each group. The key drivers of classification were network strength in beta (15–30 Hz) and delta (2–4 Hz) rhythms. Further characterization of these networks revealed the involvement of temporal, cingulate, and fronto‐parietal hubs likely underpinning the language and default‐mode networks (DMNs). Complementary evidence from a correlation analysis showed that the top‐ranked features that better discriminated individuals during rest also explained interindividual variability in second language (L2) proficiency within bilinguals, further supporting the robustness of the machine learning model in capturing trait‐like markers of bilingualism. Overall, our results show that long‐term experience with an L2 can be “brain‐read” at a fine‐grained level from resting‐state oscillatory network organization, highlighting its pervasive impact, particularly within language and DMN networks.

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Section: Discussionmentioning

confidence: 99%

Decoding bilingualism from resting‐state oscillatory network organization

Amoruso,

García,

Pusil

et al. 2024

Annals of the New York Academy of Sciences

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Switching off: disruptive TMS reveals distinct contributions of the posterior middle temporal gyrus and angular gyrus to bilingual speech production

Timofeeva,

Finisguerra,

D’Argenio

et al. 2024

Cerebral Cortex

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The role of the left temporoparietal cortex in speech production has been extensively studied during native language processing, proving crucial in controlled lexico-semantic retrieval under varying cognitive demands. Yet, its role in bilinguals, fluent in both native and second languages, remains poorly understood. Here, we employed continuous theta burst stimulation to disrupt neural activity in the left posterior middle-temporal gyrus (pMTG) and angular gyrus (AG) while Italian–Friulian bilinguals performed a cued picture-naming task. The task involved between-language (naming objects in Italian or Friulian) and within-language blocks (naming objects [“knife”] or associated actions [“cut”] in a single language) in which participants could either maintain (non-switch) or change (switch) instructions based on cues. During within-language blocks, cTBS over the pMTG entailed faster naming for high-demanding switch trials, while cTBS to the AG elicited slower latencies in low-demanding non-switch trials. No cTBS effects were observed in the between-language block. Our findings suggest a causal involvement of the left pMTG and AG in lexico-semantic processing across languages, with distinct contributions to controlled vs. “automatic” retrieval, respectively. However, they do not support the existence of shared control mechanisms within and between language(s) production. Altogether, these results inform neurobiological models of semantic control in bilinguals.

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Advances in Literary and (Neuro)Linguistics Skills That Can Contribute to Healing

Martines

2024

Educational Innovation to Address Complex Societal Challenges

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This chapter analyses the influence of bibliotherapy on the perceptions of readers (children, young people, and [older] adults) with special needs on their form of social interaction. By reading and writing, and by explaining to others what they read and write, by talking about plots, by expressing opinions and emotions, feelings and thoughts are articulated, and expressive (linguistic), relational, cognitive, and neurological abilities are improved. From linguistics (theoretical, applied, and cognitive), literary studies, translation/multilingual environments, and pedagogy (literacy, didactics of language, and literature), methodological approaches and interventions that can be useful and effective in bibliotherapy to activate neurocognitive abilities are provided. Furthermore, bibliotherapy is presented as a coherent option for improving the management of situations of confinement, physical, real, voluntary, imposed, or perceived loneliness.

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Behavioral and oscillatory signatures of switch costs in highly proficient bilinguals

Cited by 3 publications

References 81 publications

Decoding bilingualism from resting‐state oscillatory network organization

Decoding bilingualism from resting‐state oscillatory network organization

Switching off: disruptive TMS reveals distinct contributions of the posterior middle temporal gyrus and angular gyrus to bilingual speech production

Advances in Literary and (Neuro)Linguistics Skills That Can Contribute to Healing

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