Cortical network dynamics with time delays reveals functional connectivity in the resting brain.
Anandamohan Ghosh,Young-Ah Rho,Anthony R. McIntosh,Rolf Kötter,Viktor K. Jirsa,Viktor K. Jirsa +5 more
TLDR
By tuning the propagation velocity in a network based on primate connectivity, a hypothesis that time delays in the network dynamics play a crucial role in the generation of temporally coherent fluctuations is tested.Abstract:
In absence of all goal-directed behavior, a characteristic network of cortical regions involving prefrontal and cingulate cortices consistently shows temporally coherent fluctuations. The origin of these fluctuations is unknown, but has been hypothesized to be of stochastic nature. In the present paper we test the hypothesis that time delays in the network dynamics play a crucial role in the generation of these fluctuations. By tuning the propagation velocity in a network based on primate connectivity, we scale the time delays and demonstrate the emergence of the resting state networks for biophysically realistic parameters.read more
Citations
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Complex brain networks: graph theoretical analysis of structural and functional systems
Edward T. Bullmore,Olaf Sporns +1 more
TL;DR: This article reviews studies investigating complex brain networks in diverse experimental modalities and provides an accessible introduction to the basic principles of graph theory and highlights the technical challenges and key questions to be addressed by future developments in this rapidly moving field.
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Functional and effective connectivity: a review.
TL;DR: The inception of this journal has been foreshadowed by an ever-increasing number of publications on functional connectivity, causal modeling, connectomics, and multivariate analyses of distributed patterns of brain responses.
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Key role of coupling, delay, and noise in resting brain fluctuations
TL;DR: In numerical simulation, the dynamics of a simplified cortical network using 38 noise-driven (Wilson–Cowan) oscillators, which in isolation remain just below their oscillatory threshold are studied, indicating the presence of stochastic resonance and high sensitivity to changes in diffuse feedback activity.
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Networks of the Brain
TL;DR: Models of Network Growth All networks, whether they are social, technological, or biological, are the result of a growth process, and many continue to grow for prolonged periods of time, continually modifying their connectivity structure throughout their entire existence.
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Functional connectivity of the insula in the resting brain
Franco Cauda,Federico D'Agata,Katiuscia Sacco,Sergio Duca,Giuliano Geminiani,Alessandro Vercelli +5 more
TL;DR: The authors' findings document two major complementary networks involving the ventral-anterior and dorsal-posterior insula: one network links the anterior insula to the middle and inferior temporal cortex and anterior cingulate cortex, and is primarily related to limbic regions which play a role in emotional aspects, and support the use of resting state functional analysis to investigate connectivity in the living human brain.
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