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  Rolandic alpha and beta EEG rhythms' strengths are inversely related to fMRI-BOLD signal in primary somatosensory and motor cortex

Ritter, P., Moosmann, M., & Villringer, A. (2009). Rolandic alpha and beta EEG rhythms' strengths are inversely related to fMRI-BOLD signal in primary somatosensory and motor cortex. Human Brain Mapping, 30(4), 1168-1187. doi:10.1002/hbm.20585.

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 Creators:
Ritter, Petra1, Author           
Moosmann, Matthias2, Author
Villringer, Arno1, 3, Author           
Affiliations:
1Berlin NeuroImaging Center and Charité, Universitätsmedizin Berlin, ou_persistent22              
2Department of Biological and Medical Psychology, University of Bergen, Norway, ou_persistent22              
3Department Neurology, MPI for Human Cognitive and Brain Sciences, Max Planck Society, ou_634549              

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Free keywords: Alpha rhythm; Beta rhythm; Electroencephalography; Functional; Magnetic resonance imaging; Motor cortex; Somatosensory cortex
 Abstract: Similar to the posterior alpha rhythm, pericentral (Rolandic) EEG rhythms in the alpha and beta frequency range are referred to as "idle rhythms" indicating a "resting state" of the respective system. The precise function of these rhythms is not clear. We used simultaneous EEG-fMRI during a bimanual motor task to localize brain areas involved in Rolandic alpha and beta EEG rhythms. The identification of these rhythms in the MR environment was achieved by a blind source separation algorithm. Rhythm "strength", i.e. spectral power determined by wavelet analysis, inversely correlated most strongly with the fMRI-BOLD signal in the postcentral cortex for the Rolandic alpha (mu) rhythm and in the precentral cortex for the Rolandic beta rhythm. FMRI correlates of Rolandic alpha and beta rhythms were distinct from those associated with the posterior "classical" alpha rhythm, which correlated inversely with the BOLD signal in the occipital cortex. An inverse correlation with the BOLD signal in the respective sensory area seems to be a general feature of "idle rhythms". © 2008 Wiley-Liss, Inc.

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Language(s): eng - English
 Dates: 2007-07-122008-03-062008-05-082009-04
 Publication Status: Issued
 Pages: -
 Publishing info: -
 Table of Contents: -
 Rev. Type: Peer
 Identifiers: eDoc: 410694
Other: P10280
DOI: 10.1002/hbm.20585
PMC: PMC6870597
PMID: 18465747
 Degree: -

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Funding organization : German Federal Ministry for Education and Research (BMBF)
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Funding program : -
Funding organization : German Research Foundation (DFG)

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Title: Human Brain Mapping
Source Genre: Journal
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Publ. Info: New York : Wiley-Liss
Pages: - Volume / Issue: 30 (4) Sequence Number: - Start / End Page: 1168 - 1187 Identifier: ISSN: 1065-9471
CoNE: https://pure.mpg.de/cone/journals/resource/954925601686