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Similarities in the neural signature for the processing of behaviorally categorized and uncategorized speech sounds
Linköping University, The Swedish Institute for Disability Research. Linköping University, Department of Behavioural Sciences and Learning, Disability Research. Linköping University, Faculty of Arts and Sciences. (Linnaeus Centre HEAD)
Centre for the Neural Basis of Hearing, Department of Physiology, Development and Neuroscience, University of Cambridge, Cambridge, UK.
Auditory Cognition and Psychoacoustics. (Lyon Neuroscience Research Center, CNRS UMR5292, INSERM U1028 , Université de Lyon, Lyon, France)
2013 (English)In: European Journal of Neuroscience, ISSN 0953-816X, E-ISSN 1460-9568, Vol. 37, no 5, 777-785 p.Article in journal (Refereed) Published
Abstract [en]

Recent human behavioral studies have shown semantic and/or lexical processing for stimuli presented below the auditory perceptionthreshold. Here, we investigated electroencephalographic responses to words, pseudo-words and complex sounds, in conditionswhere phonological and lexical categorizations were behaviorally successful (categorized stimuli) or unsuccessful(uncategorized stimuli). Data showed a greater decrease in low-beta power at left-hemisphere temporal electrodes for categorizednon-lexical sounds (complex sounds and pseudo-words) than for categorized lexical sounds (words), consistent with the signatureof a failure in lexical access. Similar differences between lexical and non-lexical sounds were observed for uncategorized stimuli,although these stimuli did not yield evoked potentials or theta activity. The results of the present study suggest that behaviorallyuncategorized stimuli were processed at the lexical level, and provide evidence of the neural bases of the results observed in previousbehavioral studies investigating auditory perception in the absence of stimulus awareness.

Place, publisher, year, edition, pages
Wiley-Blackwell , 2013. Vol. 37, no 5, 777-785 p.
Keyword [en]
beta activity, EEG, ERP, ERSP, lexical processing
National Category
Psychology Engineering and Technology
Identifiers
URN: urn:nbn:se:liu:diva-80600DOI: 10.1111/ejn.12097ISI: 000315695200010OAI: oai:DiVA.org:liu-80600DiVA: diva2:547286
Note

Funding Agencies|Ministere de lEducation Nationale et de la Recherche of France||grant ACI Junior Research Team||grant ANR PICS||United Kingdom-Medical Research Council|G9900369MC_A060-5PQ70|

Available from: 2012-08-27 Created: 2012-08-27 Last updated: 2017-12-07Bibliographically approved

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Signoret, Carine

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