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Article: Top-down and bottom-up mechanisms as reflected by beta and gamma oscillations in speech perception: An individual-difference approach

TitleTop-down and bottom-up mechanisms as reflected by beta and gamma oscillations in speech perception: An individual-difference approach
Authors
KeywordsEEG
Beta oscillation
Gamma oscillation
Speech perception
Issue Date2019
PublisherAcademic Press. The Journal's web site is located at http://www.elsevier.com/locate/b&l
Citation
Brain and Language, 2019, v. 199, p. article no. 104700 How to Cite?
AbstractRecent neurophysiological studies have proposed distinct roles of β and γ oscillations in implementing top-down and bottom-up processes. The present study aims to test this hypothesis in the domain of speech perception. We examined β and γ oscillations elicited to a tone contrast in a passive oddball paradigm, and their relationships with discrimination sensitivity d′ and RT from two groups of healthy adults who showed high and low discrimination sensitivity to the contrast. The low-sensitivity group showed a significant reduction in β, which was further related to d′. Individual differences in RT were related to different frequency bands in the two groups, with a RT-β correlation in the low-sensitivity group, and a RT-γ relation in the high-sensitivity group. Based on these findings, we suggest that β, implicated in top-down processing, reflects individual differences in phonological representations, and that γ, involved in bottom-up processing, reflects individual differences in acoustic encoding.
Persistent Identifierhttp://hdl.handle.net/10722/287734
ISSN
2019 Impact Factor: 2.339
2015 SCImago Journal Rankings: 1.913
ISI Accession Number ID

 

DC FieldValueLanguage
dc.contributor.authorOu, J-
dc.contributor.authorLaw, SP-
dc.date.accessioned2020-10-05T12:02:29Z-
dc.date.available2020-10-05T12:02:29Z-
dc.date.issued2019-
dc.identifier.citationBrain and Language, 2019, v. 199, p. article no. 104700-
dc.identifier.issn0093-934X-
dc.identifier.urihttp://hdl.handle.net/10722/287734-
dc.description.abstractRecent neurophysiological studies have proposed distinct roles of β and γ oscillations in implementing top-down and bottom-up processes. The present study aims to test this hypothesis in the domain of speech perception. We examined β and γ oscillations elicited to a tone contrast in a passive oddball paradigm, and their relationships with discrimination sensitivity d′ and RT from two groups of healthy adults who showed high and low discrimination sensitivity to the contrast. The low-sensitivity group showed a significant reduction in β, which was further related to d′. Individual differences in RT were related to different frequency bands in the two groups, with a RT-β correlation in the low-sensitivity group, and a RT-γ relation in the high-sensitivity group. Based on these findings, we suggest that β, implicated in top-down processing, reflects individual differences in phonological representations, and that γ, involved in bottom-up processing, reflects individual differences in acoustic encoding.-
dc.languageeng-
dc.publisherAcademic Press. The Journal's web site is located at http://www.elsevier.com/locate/b&l-
dc.relation.ispartofBrain and Language-
dc.subjectEEG-
dc.subjectBeta oscillation-
dc.subjectGamma oscillation-
dc.subjectSpeech perception-
dc.titleTop-down and bottom-up mechanisms as reflected by beta and gamma oscillations in speech perception: An individual-difference approach-
dc.typeArticle-
dc.identifier.emailLaw, SP: splaw@hku.hk-
dc.identifier.authorityLaw, SP=rp00920-
dc.description.naturelink_to_subscribed_fulltext-
dc.identifier.doi10.1016/j.bandl.2019.104700-
dc.identifier.pmid31586791-
dc.identifier.scopuseid_2-s2.0-85072787368-
dc.identifier.hkuros314703-
dc.identifier.volume199-
dc.identifier.spagearticle no. 104700-
dc.identifier.epagearticle no. 104700-
dc.identifier.isiWOS:000498754000007-
dc.publisher.placeUnited States-
dc.identifier.issnl0093-934X-

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