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          Institute: Ernst Strüngmann Institute     Collection: Publikationen des Ernst Strüngmann Institutes     Display Documents

ID: 689114.0, Ernst Strüngmann Institute / Publikationen des Ernst Strüngmann Institutes
The Phase of Thalamic Alpha Activity Modulates Cortical Gamma-Band Activity: Evidence from Resting-State MEG Recordings
Authors:Roux, F.; Wibral, M.; Singer, W.; Aru, J.; Uhlhaas, P. J.
Date of Publication (YYYY-MM-DD):2013-11-06
Journal Abbrev.:Journal of Neuroscience
Issue / Number:45
Start Page:17827
End Page:17835
Audience:Not Specified
Abstract / Description:Recent findings have implicated thalamic alpha oscillations in the phasic modulation of cortical activity. However, the precise relationship between thalamic alpha oscillations and neocortical activity remains unclear. Here we show in a large sample of healthy human participants (n = 45) using spatial filtering techniques and measures of phase amplitude coupling that the amplitude of gamma-band activity in posterior medial parietal cortex is modulated by the phase of thalamic alpha oscillations during eyes-closed resting-state recordings. In addition, our findings show that gamma-band activity in visual cortex was not modulated by thalamic alpha oscillations but coupled to the phase of strong cortical alpha activity. To overcome the limitations of electromagnetic source localization we estimated conduction delays using transfer entropy and found nonspurious information transfer from thalamus to cortex. The present findings provide novel evidence for magneto-encephalography-measured phase coupling between cortical gamma-band activity and thalamic alpha oscillations, which highlight the role of phasic inhibition in the coordination of cortical activity.
Free Keywords:neuronal population-dynamics; monkey visual-cortex; transfer entropy; human brain; oscillations; eeg; frequency; humans; rhythm; inhibition
External Publication Status:published
Document Type:Article
Communicated by:N.N.
Affiliations:Ernst Strüngmann Institute
External Affiliations:Univ Glasgow, Inst Neurosci & Psychol, Hillead St 58, Glasgow G12 8QB, Lanark, Scotland Basque Ctr Cognit Brain & Language BCBL, San Sebastian 2009, Spain Goethe Univ Frankfurt, Brain Imaging Ctr, MEG Unit, D-60528 Frankfurt, Germany Max Planck Inst Brain Res, Dept Neurophysiol, D-60438 Frankfurt, Germany Ernst Strungmann Inst, D-60528 Frankfurt, Germany Frankfurt Inst Adv Sci, D-60438 Frankfurt, Germany Univ Glasgow, Inst Neurosci & Psychol, Glasgow G12 8QB, Lanark, Scotland %G English
Identifiers:ISSN:0270-6474 %R http://dx.doi.org/10.1523/JNEUROSCI.5... [ID No:1]
URL:<Go to ISI>://WOS:000327019100029 [ID No:2]
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