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Cited by 769

The DOI matches its Crossref record; 10 of the 10 references it cites were found in a registry or an index.

Key role of coupling, delay, and noise in resting brain fluctuations

Open access
Deco, Gustavo, Jirsa, Viktor, McIntosh, A. R., Sporns, Olaf, Kötter, Rolf·2009·Proceedings of the National Academy of Sciences
DOI 10.1073/pnas.0901831106
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Abstract

A growing body of neuroimaging research has documented that, in the absence of an explicit task, the brain shows temporally coherent activity. This so-called “resting state” activity or, more explicitly, the default-mode network, has been associated with daydreaming, free association, stream of consciousness, or inner rehearsal in humans, but similar patterns have also been found under anesthesia and in monkeys. Spatiotemporal activity patterns in the default-mode network are both complex and consistent, which raises the question whether they are the expression of an interesting cognitive architecture or the consequence of intrinsic network constraints. In numerical simulation, we studied the dynamics of a simplified cortical network using 38 noise-driven (Wilson–Cowan) oscillators, which in isolation remain just below their oscillatory threshold. Time delay coupling based on lengths and strengths of primate corticocortical pathways leads to the emergence of 2 sets of 40-Hz oscillators. The sets showed synchronization that was anticorrelated at <0.1 Hz across the sets in line with a wide range of recent experimental observations. Systematic variation of conduction velocity, coupling strength, and noise level indicate a high sensitivity of emerging synchrony as well as simulated blood flow blood oxygen level-dependent (BOLD) on the underlying parameter values. Optimal sensitivity was observed around conduction velocities of 1–2 m/s, with very weak coupling between oscillators. An additional finding was that the optimal noise level had a characteristic scale, indicating the presence of stochastic resonance, which allows the network dynamics to respond with high sensitivity to changes in diffuse feedback activity.

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Show all 10 references

Research works printed but not linked: 26

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Metadata

Authors
Deco, G., Jirsa, V., McIntosh, A. R., Sporns, O., & Kötter, R.
Venue
Proceedings of the National Academy of Sciences
Publisher
Proceedings of the National Academy of Sciences
Published
2009-06-23
Volume
106
Issue
25
Pages
10302-10307
ISSN
  • 0027-8424 (ISSN-L)
  • 1091-6490
DOI
10.1073/pnas.0901831106
OpenAlex
W2116647777
Cited by
769
References
10
FWCI
17.97
Type
journal article
Language
en
Update notices
correction (2009-07-21)
Open access
green

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