Distinct patterns of brain activity characterise lexical activation and competition in spoken word production.

According to a prominent theory of language production, concepts activate multiple associated words in memory, which enter into competition for selection. However, only a few electrophysiological studies have identified brain responses reflecting competition. Here, we report a magnetoencephalography...

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Autores principales:	Vitória Piai, Ardi Roelofs, Ole Jensen, Jan-Mathijs Schoffelen, Mathilde Bonnefond
Formato:	article
Lenguaje:	EN
Publicado:	Public Library of Science (PLoS) 2014
Materias:	Medicine R Science Q
Acceso en línea:	https://doaj.org/article/129c2924ea6647f58a2634226ceb35e2
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id	oai:doaj.org-article:129c2924ea6647f58a2634226ceb35e2
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spelling	oai:doaj.org-article:129c2924ea6647f58a2634226ceb35e22021-11-18T08:32:17ZDistinct patterns of brain activity characterise lexical activation and competition in spoken word production.1932-620310.1371/journal.pone.0088674https://doaj.org/article/129c2924ea6647f58a2634226ceb35e22014-01-01T00:00:00Zhttps://www.ncbi.nlm.nih.gov/pmc/articles/pmid/24558410/pdf/?tool=EBIhttps://doaj.org/toc/1932-6203According to a prominent theory of language production, concepts activate multiple associated words in memory, which enter into competition for selection. However, only a few electrophysiological studies have identified brain responses reflecting competition. Here, we report a magnetoencephalography study in which the activation of competing words was manipulated by presenting pictures (e.g., dog) with distractor words. The distractor and picture name were semantically related (cat), unrelated (pin), or identical (dog). Related distractors are stronger competitors to the picture name because they receive additional activation from the picture relative to other distractors. Picture naming times were longer with related than unrelated and identical distractors. Phase-locked and non-phase-locked activity were distinct but temporally related. Phase-locked activity in left temporal cortex, peaking at 400 ms, was larger on unrelated than related and identical trials, suggesting differential activation of alternative words by the picture-word stimuli. Non-phase-locked activity between roughly 350-650 ms (4-10 Hz) in left superior frontal gyrus was larger on related than unrelated and identical trials, suggesting differential resolution of the competition among the alternatives, as reflected in the naming times. These findings characterise distinct patterns of activity associated with lexical activation and competition, supporting the theory that words are selected by competition.Vitória PiaiArdi RoelofsOle JensenJan-Mathijs SchoffelenMathilde BonnefondPublic Library of Science (PLoS)articleMedicineRScienceQENPLoS ONE, Vol 9, Iss 2, p e88674 (2014)
institution	DOAJ
collection	DOAJ
language	EN
topic	Medicine R Science Q
spellingShingle	Medicine R Science Q Vitória Piai Ardi Roelofs Ole Jensen Jan-Mathijs Schoffelen Mathilde Bonnefond Distinct patterns of brain activity characterise lexical activation and competition in spoken word production.
description	According to a prominent theory of language production, concepts activate multiple associated words in memory, which enter into competition for selection. However, only a few electrophysiological studies have identified brain responses reflecting competition. Here, we report a magnetoencephalography study in which the activation of competing words was manipulated by presenting pictures (e.g., dog) with distractor words. The distractor and picture name were semantically related (cat), unrelated (pin), or identical (dog). Related distractors are stronger competitors to the picture name because they receive additional activation from the picture relative to other distractors. Picture naming times were longer with related than unrelated and identical distractors. Phase-locked and non-phase-locked activity were distinct but temporally related. Phase-locked activity in left temporal cortex, peaking at 400 ms, was larger on unrelated than related and identical trials, suggesting differential activation of alternative words by the picture-word stimuli. Non-phase-locked activity between roughly 350-650 ms (4-10 Hz) in left superior frontal gyrus was larger on related than unrelated and identical trials, suggesting differential resolution of the competition among the alternatives, as reflected in the naming times. These findings characterise distinct patterns of activity associated with lexical activation and competition, supporting the theory that words are selected by competition.
format	article
author	Vitória Piai Ardi Roelofs Ole Jensen Jan-Mathijs Schoffelen Mathilde Bonnefond
author_facet	Vitória Piai Ardi Roelofs Ole Jensen Jan-Mathijs Schoffelen Mathilde Bonnefond
author_sort	Vitória Piai
title	Distinct patterns of brain activity characterise lexical activation and competition in spoken word production.
title_short	Distinct patterns of brain activity characterise lexical activation and competition in spoken word production.
title_full	Distinct patterns of brain activity characterise lexical activation and competition in spoken word production.
title_fullStr	Distinct patterns of brain activity characterise lexical activation and competition in spoken word production.
title_full_unstemmed	Distinct patterns of brain activity characterise lexical activation and competition in spoken word production.
title_sort	distinct patterns of brain activity characterise lexical activation and competition in spoken word production.
publisher	Public Library of Science (PLoS)
publishDate	2014
url	https://doaj.org/article/129c2924ea6647f58a2634226ceb35e2
work_keys_str_mv	AT vitoriapiai distinctpatternsofbrainactivitycharacteriselexicalactivationandcompetitioninspokenwordproduction AT ardiroelofs distinctpatternsofbrainactivitycharacteriselexicalactivationandcompetitioninspokenwordproduction AT olejensen distinctpatternsofbrainactivitycharacteriselexicalactivationandcompetitioninspokenwordproduction AT janmathijsschoffelen distinctpatternsofbrainactivitycharacteriselexicalactivationandcompetitioninspokenwordproduction AT mathildebonnefond distinctpatternsofbrainactivitycharacteriselexicalactivationandcompetitioninspokenwordproduction
_version_	1718421666374090752

Distinct patterns of brain activity characterise lexical activation and competition in spoken word production.

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