Fast transient networks in spontaneous human brain activity

Baker, Adam P. and Brookes, Matthew J. and Rezek, Iead A. and Smith, Stephen M. and Behrens, Timothy and Probert Smith, Penny J. and Woolrich, Mark W. (2014) Fast transient networks in spontaneous human brain activity. eLife, 3 . e01867/1-e01867/18. ISSN 2050-084X

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Abstract

To provide an effective substrate for cognitive processes, functional brain networks should be able to reorganize and coordinate on a sub-second temporal scale. We used magnetoencephalography recordings of spontaneous activity to characterize whole-brain functional connectivity dynamics at high temporal resolution. Using a novel approach that identifies the points in time at which unique patterns of activity recur, we reveal transient (100–200 ms) brain states with spatial topographies similar to those of well-known resting state networks. By assessing temporal changes in the occurrence of these states, we demonstrate that within-network functional connectivity is underpinned by coordinated neuronal dynamics that fluctuate much more rapidly than has previously been shown. We further evaluate cross-network interactions, and show that anticorrelation between the default mode network and parietal regions of the dorsal attention network is consistent with an inability of the system to transition directly between two transient brain states.

Item Type: Article
Schools/Departments: University of Nottingham, UK > Faculty of Science > School of Physics and Astronomy
Identification Number: 10.7554/eLife.01867
Depositing User: Brookes, Matthew
Date Deposited: 20 Apr 2017 10:56
Last Modified: 20 Apr 2017 10:59
URI: http://eprints.nottingham.ac.uk/id/eprint/42022

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