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  Conscious auditory perception related to long-range synchrony of gamma oscillations

Steinmann, S. S., Leicht, G., Ertl, M., Andreou, C., Polomac, N., Westerhausen, R., et al. (2014). Conscious auditory perception related to long-range synchrony of gamma oscillations. NeuroImage, 100, 435-443. doi:10.1016/j.neuroimage.2014.06.012.

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Item Permalink: http://hdl.handle.net/11858/00-001M-0000-0019-F4C8-5 Version Permalink: http://hdl.handle.net/21.11116/0000-0003-82B7-B
Genre: Journal Article

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 Creators:
Steinmann, S. S.1, Author
Leicht, G.1, Author
Ertl, M.1, Author
Andreou, C.1, Author
Polomac, Nenad1, Author
Westerhausen, R.2, 3, Author
Friederici, Angela D.4, Author              
Mulert, C.1, Author
Affiliations:
1Psychiatry Neuroimaging Branch, Department of Psychiatry and Psychotherapy, University Medical Center Hamburg, Hamburg, Germany, ou_persistent22              
2Department of Biological and Medical Psychology, University of Bergen, Bergen, Norway, ou_persistent22              
3Division of Psychiatry, Haukeland Hospital, Bergen, Norway, ou_persistent22              
4Department Neuropsychology, MPI for Human Cognitive and Brain Sciences, Max Planck Society, ou_634551              

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Free keywords: Auditory cortex; Dichotic listening task; EEG; eLORETA; Functional connectivity; Gamma; Interhemispheric auditory pathways
 Abstract: While the role of synchronized oscillatory activity in the gamma-band frequency range for conscious perception is well established in the visual domain, there is limited evidence concerning neurophysiological mechanisms in conscious auditory perception. In the current study, we addressed this issue with 64-channel EEG and a dichotic listening (DL) task in twenty-five healthy participants. The typical finding of DL is a more frequent conscious perception of the speech syllable presented to the right ear (RE), which is attributed to the supremacy of the contralateral pathways running from the RE to the speech-dominant left hemisphere. In contrast, the left ear (LE) input initially accesses the right hemisphere and needs additional transfer via interhemispheric pathways before it is processed in the left hemisphere. Using lagged phase synchronization (LPS) analysis and eLORETA source estimation we examined the functional connectivity between right and left primary and secondary auditory cortices in the main frequency bands (delta, theta, alpha, beta, gamma) during RE/LE-reports. Interhemispheric LPS between right and left primary and secondary auditory cortices was specifically increased in the gamma-band range, when participants consciously perceived the syllable presented to the LE. Our results suggest that synchronous gamma oscillations are involved in interhemispheric transfer of auditory information.

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Language(s): eng - English
 Dates: 2014-06-052014-06-172014-10-15
 Publication Status: Published in print
 Pages: -
 Publishing info: -
 Table of Contents: -
 Rev. Method: Peer
 Identifiers: DOI: 10.1016/j.neuroimage.2014.06.012
PMID: 24945670
Other: Epub 2014
 Degree: -

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Title: NeuroImage
Source Genre: Journal
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Pages: - Volume / Issue: 100 Sequence Number: - Start / End Page: 435 - 443 Identifier: ISSN: 1053-8119
CoNE: /journals/resource/954922650166