dc.contributor.author	Ewald, Arne
dc.contributor.author	Aristei, Sabrina
dc.contributor.author	Nolte, Guido
dc.contributor.author	Rahman, Rasha Abdel
dc.date.accessioned	2019-11-06T16:12:23Z
dc.date.available	2019-11-06T16:12:23Z
dc.date.issued	2012-06-07
dc.date.updated	2019-10-23T04:35:40Z
dc.description.abstract	In the present study we investigate the communication of different large scale brain sites during an overt language production task with state of the art methods for the estimation of EEG functional connectivity. Participants performed a semantic blocking task in which objects were named in semantically homogeneous blocks of trials consisting of members of a semantic category (e.g., all objects are tools) or in heterogeneous blocks, consisting of unrelated objects. The classic pattern of slower naming times in the homogeneous relative to heterogeneous blocks is assumed to reflect the duration of lexical selection. For the collected data in the homogeneous and heterogeneous conditions the imaginary part of coherency (ImC) was evaluated at different frequencies. The ImC is a measure for detecting the coupling of different brain sites acting on sensor level. Most importantly, the ImC is robust to the artifact of volume conduction. We analyzed the ImC at all pairs of 56 EEG channels across all frequencies. Contrasting the two experimental conditions we found pronounced differences in the theta band at 7 Hz and estimated the most dominant underlying brain sources via a minimum norm inverse solution based on the ImC. As a result of the source localization, we observed connectivity between occipito-temporal and frontal areas, which are well-known to play a major role in lexical-semantic language processes. Our findings demonstrate the feasibility of investigating interactive brain activity during overt language production.
dc.identifier.eissn	1664-1078
dc.identifier.uri	https://depositonce.tu-berlin.de/handle/11303/10260
dc.identifier.uri	http://dx.doi.org/10.14279/depositonce-9222
dc.language.iso	en	en
dc.rights.uri	https://creativecommons.org/licenses/by-nc/3.0/	en
dc.subject.ddc	150 Psychologie	de
dc.subject.other	overt language production	en
dc.subject.other	semantic interference	en
dc.subject.other	brain oscillations	en
dc.subject.other	functional connectivity	en
dc.title	Brain Oscillations and Functional Connectivity during Overt Language Production	en
dc.type	Article	en
dc.type.version	publishedVersion	en
dcterms.bibliographicCitation.articlenumber	166	en
dcterms.bibliographicCitation.doi	10.3389/fpsyg.2012.00166	en
dcterms.bibliographicCitation.journaltitle	Frontiers in Psychology	en
dcterms.bibliographicCitation.originalpublishername	Frontiers Media S.A.	en
dcterms.bibliographicCitation.originalpublisherplace	Lausanne	en
dcterms.bibliographicCitation.volume	3	en
tub.accessrights.dnb	free	en
tub.affiliation	Fak. 4 Elektrotechnik und Informatik::Inst. Softwaretechnik und Theoretische Informatik::FG Maschinelles Lernen	de
tub.affiliation.faculty	Fak. 4 Elektrotechnik und Informatik	de
tub.affiliation.group	FG Maschinelles Lernen	de
tub.affiliation.institute	Inst. Softwaretechnik und Theoretische Informatik	de
tub.publisher.universityorinstitution	Technische Universität Berlin	en

Brain Oscillations and Functional Connectivity during Overt Language Production

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