Transient selective aphasia in highly proficient bilinguals triggered by electrical stimulation of the left superior temporal gyrus

Are an individual's first (L1) and second (L2) languages represented in shared or distinct brain territories? Using intraoperative electrical stimulation mapping (ESM) in two Basque-Spanish bilinguals with non-growing lesions-thus avoiding confounding effects of adaptive plasticity-this study identified distinct language representations within the left temporal lobe. Stimulation of posterior and anterior superior temporal gyri induced language-selective aphasias, whereas stimulation of the mid-temporal region and inferior fronto-occipital fasciculus produced naming errors without language specificity. These findings highlight both shared and distinct loci for L1 and L2, advancing our understanding of bilingual brain organization.

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Publication Details

Journal
Acta Neurochirurgica
Published
2025-04-05
DOI
https://doi.org/10.1007/s00701-025-06508-5
Primary Topic
Neurobiology of Language and Bilingualism
Type
article
Field-Weighted Citation Impact
0.00

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article

Transient selective aphasia in highly proficient bilinguals triggered by electrical stimulation of the left superior temporal gyrus

Garazi Bermúdez, Sandra Gisbert‐Muñoz, Lucía Amoruso, Santiago Gil Robles et al.
Acta Neurochirurgica
Neurobiology of Language and Bilingualism
article

Transient selective aphasia in highly proficient bilinguals triggered by electrical stimulation of the left superior temporal gyrus

Garazi Bermúdez, Sandra Gisbert‐Muñoz, Lucía Amoruso, Santiago Gil Robles, Manuel Carreiras, Ileana Quiñones, Iñigo Pomposo
article en

Abstract

Are an individual's first (L1) and second (L2) languages represented in shared or distinct brain territories? Using intraoperative electrical stimulation mapping (ESM) in two Basque-Spanish bilinguals with non-growing lesions-thus avoiding confounding effects of adaptive plasticity-this study identified distinct language representations within the left temporal lobe. Stimulation of posterior and anterior superior temporal gyri induced language-selective aphasias, whereas stimulation of the mid-temporal region and inferior fronto-occipital fasciculus produced naming errors without language specificity. These findings highlight both shared and distinct loci for L1 and L2, advancing our understanding of bilingual brain organization.

Acta NeurochirurgicaVol. 167(1)
Ikerbasque (ES), University of the Basque Country (ES), BioCruces Health research Institute (ES), Basque Center on Cognition, Brain and Language (ES), Hospital Universitario Quirónsalud Madrid (ES), Hospital Quirónsalud Barcelona (ES), Hospital de Cruces (ES), ESIC Business & Marketing School, EAE Business School (ES)
“la Caixa” Foundation, European Commission, Eusko Jaurlaritza, Ministerio de Economía y Competitividad, Euskal Herriko Unibertsitatea, Fundación Bancaria Caixa d'Estalvis i Pensions de Barcelona, Agencia Estatal de Investigación
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