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  Alpha-band brain oscillations shape the processing of perceptible as well as imperceptible somatosensory stimuli during selective attention

Forschack, N., Nierhaus, T., Müller, M. M., & Villringer, A. (2017). Alpha-band brain oscillations shape the processing of perceptible as well as imperceptible somatosensory stimuli during selective attention. The Journal of Neuroscience, 37(29), 6983-6994. doi:10.1523/JNEUROSCI.2582-16.2017.

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Item Permalink: http://hdl.handle.net/11858/00-001M-0000-002D-927E-2 Version Permalink: http://hdl.handle.net/21.11116/0000-0005-0F35-0
Genre: Journal Article

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 Creators:
Forschack, Norman1, Author              
Nierhaus, Till1, 2, Author              
Müller, Matthias M.3, Author
Villringer, Arno1, 4, Author              
Affiliations:
1Department Neurology, MPI for Human Cognitive and Brain Sciences, Max Planck Society, ou_634549              
2Neurocomputation and Neuroimaging Unit, FU Berlin, Germany, ou_persistent22              
3Institute of Psychology, University of Leipzig, Germany, ou_persistent22              
4Berlin School of Mind and Brain, Humboldt University Berlin, Germany, ou_persistent22              

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Free keywords: Electroencephalography; Linear mixed effects modeling; Mu-alpha oscillations; Somatosensory evoked potentials; Spatial selective attention; Subthreshold electrical stimulation
 Abstract: Attention filters and weights sensory information according to behavioral demands. Stimulus-related neural responses are increased for the attended stimulus. Does alpha-band activity mediate this effect and is it restricted to conscious sensory events (suprathreshold), or does it also extend to unconscious stimuli (subthreshold)? To address these questions, we recorded EEG in healthy male and female volunteers undergoing subthreshold and suprathreshold somatosensory electrical stimulation to the left or right index finger. The task was to detect stimulation at the randomly alternated cued index finger. Under attention, amplitudes of somatosensory evoked potentials increased 50--60 ms after stimulation (P1) for both suprathreshold and subthreshold events. Pre-stimulus amplitude of peri-Rolandic alpha, that is mu, showed an inverse relationship to P1 amplitude during attention, compared to when the finger was unattended. Interestingly, intermediate and high amplitudes of mu rhythm were associated with the highest P1 amplitudes during attention and smallest P1 during lack of attention, that is, these levels of alpha rhythm seemed to optimally support the behavioral goal (“detect” stimuli at the cued finger while ignoring the other finger). Our results show that attention enhances neural processing for both suprathreshold and subthreshold stimuli and they highlight a rather complex interaction between attention, Rolandic alpha activity, and their effects on stimulus processing.

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Language(s): eng - English
 Dates: 2017-05-122016-08-152017-05-172017-06-192017-07-19
 Publication Status: Published in print
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 Table of Contents: -
 Rev. Method: Peer
 Identifiers: DOI: 10.1523/JNEUROSCI.2582-16.2017
PMID: 28630252
Other: Epub 2017
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Project name : Funktion von Aufmerksamkeit bei kognitiven Prozessen / GRK 1182
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Funding organization : Deutsche Forschungsgemeinschaft (DFG)

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Title: The Journal of Neuroscience
  Abbreviation : J. Neurosci.
Source Genre: Journal
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Pages: - Volume / Issue: 37 (29) Sequence Number: - Start / End Page: 6983 - 6994 Identifier: ISSN: 0270-6474
CoNE: /journals/resource/954925502187_1