TMS uncovers details about sub-regional language-specific processing networks in early bilinguals

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TMS uncovers details about sub-regional language-specific processing networks in early bilinguals. / Hämäläinen, Sini; Mäkelä, Niko; Sairanen, Viljami; Lehtonen, Minna; Kujala, Teija; Leminen, Alina.

In: NeuroImage, Vol. 171, 01.05.2018, p. 209-221.

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Hämäläinen, Sini ; Mäkelä, Niko ; Sairanen, Viljami ; Lehtonen, Minna ; Kujala, Teija ; Leminen, Alina. / TMS uncovers details about sub-regional language-specific processing networks in early bilinguals. In: NeuroImage. 2018 ; Vol. 171. pp. 209-221.

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@article{6bf2076ccf6042e59c98737bfd7ae718,
title = "TMS uncovers details about sub-regional language-specific processing networks in early bilinguals",
abstract = "Despite numerous functional neuroimaging and intraoperative electrical cortical mapping studies aimed at investigating the cortical organisation of native (L1) and second (L2) language processing, the neural underpinnings of bilingualism remain elusive. We investigated whether the neural network engaged in speech production over the bilateral posterior inferior frontal gyrus (pIFG) is the same (i.e., shared) or different (i.e., language-specific) for the two languages of bilingual speakers. Navigated transcranial magnetic stimulation (TMS) was applied over the left and right posterior inferior gyrus (pIFG), while early simultaneous bilinguals performed a picture naming task with their native languages. An ex-Gaussian distribution was fitted to the naming latencies and the resulting parameters were compared between languages and across stimulation conditions. The results showed that although the naming performance in general was highly comparable between the languages, TMS produced a language-specific effect when the pulses were delivered to the left pIFG at 200 ms poststimulus. We argue that this result causally demonstrates, for the first time, that even within common language-processing areas, there are distinct language-specific neural populations for the different languages in early simultaneous bilinguals.",
keywords = "Bilingualism, Language-specific, Picture naming, TMS",
author = "Sini H{\"a}m{\"a}l{\"a}inen and Niko M{\"a}kel{\"a} and Viljami Sairanen and Minna Lehtonen and Teija Kujala and Alina Leminen",
year = "2018",
month = "5",
day = "1",
doi = "10.1016/j.neuroimage.2017.12.086",
language = "English",
volume = "171",
pages = "209--221",
journal = "NeuroImage",
issn = "1053-8119",

}

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TY - JOUR

T1 - TMS uncovers details about sub-regional language-specific processing networks in early bilinguals

AU - Hämäläinen, Sini

AU - Mäkelä, Niko

AU - Sairanen, Viljami

AU - Lehtonen, Minna

AU - Kujala, Teija

AU - Leminen, Alina

PY - 2018/5/1

Y1 - 2018/5/1

N2 - Despite numerous functional neuroimaging and intraoperative electrical cortical mapping studies aimed at investigating the cortical organisation of native (L1) and second (L2) language processing, the neural underpinnings of bilingualism remain elusive. We investigated whether the neural network engaged in speech production over the bilateral posterior inferior frontal gyrus (pIFG) is the same (i.e., shared) or different (i.e., language-specific) for the two languages of bilingual speakers. Navigated transcranial magnetic stimulation (TMS) was applied over the left and right posterior inferior gyrus (pIFG), while early simultaneous bilinguals performed a picture naming task with their native languages. An ex-Gaussian distribution was fitted to the naming latencies and the resulting parameters were compared between languages and across stimulation conditions. The results showed that although the naming performance in general was highly comparable between the languages, TMS produced a language-specific effect when the pulses were delivered to the left pIFG at 200 ms poststimulus. We argue that this result causally demonstrates, for the first time, that even within common language-processing areas, there are distinct language-specific neural populations for the different languages in early simultaneous bilinguals.

AB - Despite numerous functional neuroimaging and intraoperative electrical cortical mapping studies aimed at investigating the cortical organisation of native (L1) and second (L2) language processing, the neural underpinnings of bilingualism remain elusive. We investigated whether the neural network engaged in speech production over the bilateral posterior inferior frontal gyrus (pIFG) is the same (i.e., shared) or different (i.e., language-specific) for the two languages of bilingual speakers. Navigated transcranial magnetic stimulation (TMS) was applied over the left and right posterior inferior gyrus (pIFG), while early simultaneous bilinguals performed a picture naming task with their native languages. An ex-Gaussian distribution was fitted to the naming latencies and the resulting parameters were compared between languages and across stimulation conditions. The results showed that although the naming performance in general was highly comparable between the languages, TMS produced a language-specific effect when the pulses were delivered to the left pIFG at 200 ms poststimulus. We argue that this result causally demonstrates, for the first time, that even within common language-processing areas, there are distinct language-specific neural populations for the different languages in early simultaneous bilinguals.

KW - Bilingualism

KW - Language-specific

KW - Picture naming

KW - TMS

UR - http://www.scopus.com/inward/record.url?scp=85042923589&partnerID=8YFLogxK

U2 - 10.1016/j.neuroimage.2017.12.086

DO - 10.1016/j.neuroimage.2017.12.086

M3 - Article

VL - 171

SP - 209

EP - 221

JO - NeuroImage

JF - NeuroImage

SN - 1053-8119

ER -

ID: 18275863