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  Top-down attentional processing enhances auditory evoked gamma band activity

Debener, S., Herrmann, C. S., Kranczioch, C., Gembris, D., & Engel, A. K. (2003). Top-down attentional processing enhances auditory evoked gamma band activity. NeuroReport, 14(5), 683-686. doi:10.1097/01.wnr.0000064987.96259.5c.

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Item Permalink: http://hdl.handle.net/11858/00-001M-0000-0010-E538-E Version Permalink: http://hdl.handle.net/11858/00-001M-0000-002C-5F7A-E
Genre: Journal Article

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Debener, Stefan, Author
Herrmann, Christoph S.1, Author              
Kranczioch, C., Author
Gembris, D., Author
Engel, Andreas K., Author
Affiliations:
1MPI of Cognitive Neuroscience (Leipzig, -2003), The Prior Institutes, MPI for Human Cognitive and Brain Sciences, Max Planck Society, ou_634574              

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 Abstract: In contrast to animal studies, relatively little is known about the functional significance of the early evoked gamma band activity in humans. We investigated whether evoked and induced 40 Hz activity differentiate automatic, bottom-up aspects of attention from voluntary, top-down related attentional demands. An auditory novelty-oddball task was applied to 14 healthy subjects. As predicted, more evoked gamma was found for the target condition than in the two task-irrelevant conditions. Since gamma band activity was not enhanced for novel stimuli, the evoked gamma response cannot be explained with a simple concept of stimulus arousal. Neither induced gamma nor the degree of 40 Hz phase-locking were different between the experimental conditions. Taken together, our data emphasize the role of evoked gamma band activity for top-down attentional processing.

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Language(s): eng - English
 Dates: 2003
 Publication Status: Published in print
 Pages: -
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 Table of Contents: -
 Rev. Method: -
 Identifiers: eDoc: 239284
DOI: 10.1097/01.wnr.0000064987.96259.5c
Other: P6781
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Title: NeuroReport
Source Genre: Journal
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Publ. Info: Oxford, UK : Rapid Communications of Oxford Ltd.
Pages: - Volume / Issue: 14 (5) Sequence Number: - Start / End Page: 683 - 686 Identifier: ISSN: 0959-4965
CoNE: https://pure.mpg.de/cone/journals/resource/954925578070