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  Connections between intraparietal sulcus and a sensorimotor network underpin sustained tactile attention

Goltz, D., Gundlach, C., Nierhaus, T., Villringer, A., Müller, M., & Pleger, B. (2015). Connections between intraparietal sulcus and a sensorimotor network underpin sustained tactile attention. The Journal of Neuroscience, 35(20), 7938-7949. doi:10.1523/JNEUROSCI.3421-14.2015.

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Item Permalink: http://hdl.handle.net/11858/00-001M-0000-0029-3248-0 Version Permalink: http://hdl.handle.net/21.11116/0000-0003-7949-4
Genre: Journal Article

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 Creators:
Goltz, Dominique1, 2, 3, Author              
Gundlach, Christopher1, 2, Author              
Nierhaus, Till1, 4, 5, Author              
Villringer, Arno1, 4, 6, Author              
Müller, Matthias2, Author
Pleger, Burkhard1, 6, Author              
Affiliations:
1Department Neurology, MPI for Human Cognitive and Brain Sciences, Max Planck Society, ou_634549              
2Institute of Psychology, University of Leipzig, Germany, ou_persistent22              
3Department of Systems Neuroscience, University Medical Center Hamburg-Eppendorf, Germany, ou_persistent22              
4Berlin School of Mind and Brain, Humboldt University Berlin, Germany, ou_persistent22              
5Neurocomputation and Neuroimaging Unit, FU Berlin, Germany, ou_persistent22              
6Clinic for Cognitive Neurology, University of Leipzig, Germany, ou_persistent22              

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Free keywords: Attention; Brain connectivity; Intraparietal sulcus; Simultaneous EEG-fMRI; Somatosensation; Steady-state somatosensory evoked potentials
 Abstract: Previous studies on sustained tactile attention draw conclusions about underlying cortical networks by averaging over experimental conditions without considering attentional variance in single trials. This may have formed an imprecise picture of brain processes underpinning sustained tactile attention. In the present study, we simultaneously recorded EEG-fMRI and used modulations of steady-state somatosensory evoked potentials (SSSEPs) as a measure of attentional trial-by-trial variability. Therefore, frequency-tagged streams of vibrotactile stimulations were simultaneously presented to both index fingers. Human participants were cued to sustain attention to either the left or right finger stimulation and to press a button whenever they perceived a target pulse embedded in the to-be-attended stream. In-line with previous studies, a classical general linear model (GLM) analysis based on cued attention conditions revealed increased activity mainly in somatosensory and cerebellar regions. Yet, parametric modeling of the BOLD response using simultaneously recorded SSSEPs as a marker of attentional trial-by-trial variability quarried the intraparietal sulcus (IPS). The IPS in turn showed enhanced functional connectivity to a modality-unspecific attention network. However, this was only revealed on the basis of cued attention conditions in the classical GLM. By considering attentional variability as captured by SSSEPs, the IPS showed increased connectivity to a sensorimotor network, underpinning attentional selection processes between competing tactile stimuli and action choices (press a button or not). Thus, the current findings highlight the potential value by considering attentional variations in single trials and extend previous knowledge on the role of the IPS in tactile attention.

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Language(s): eng - English
 Dates: 2015-05-20
 Publication Status: Published in print
 Pages: -
 Publishing info: -
 Table of Contents: -
 Rev. Method: Peer
 Identifiers: DOI: 10.1523/JNEUROSCI.3421-14.2015
PMID: 25995478
 Degree: -

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Title: The Journal of Neuroscience
  Other : J. Neurosci.
Source Genre: Journal
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Publ. Info: Baltimore, MD : The Society
Pages: - Volume / Issue: 35 (20) Sequence Number: - Start / End Page: 7938 - 7949 Identifier: ISSN: 0270-6474
CoNE: /journals/resource/954925502187