Results 21 to 30 of about 3,636,428 (307)

Connectivity of submodular functions

open access: yesDiscrete Mathematics, 1992
This paper relates the connectivity of submodular functions \(f\) to that of certain submodular functions which are derived from \(f\). Here the function \(f\) on \(S\) is submodular if \(f(A)+f(B)\geq f(A\cup B)+f(A\cap B)\) for all subsets \(A\) and \(B\) of \(S\).
James G. Oxley, Geoff Whittle
openaire   +2 more sources

Biophysical Modulations of Functional Connectivity [PDF]

open access: yesBrain Connectivity, 2011
Resting-state low frequency oscillations have been detected in many functional magnetic resonance imaging (MRI) studies and appear to be synchronized between functionally related areas. Converging evidence from MRI and other imaging modalities suggest that this activity has an intrinsic neuronal origin.
Peltier, Scott J., Shah, Yash
openaire   +3 more sources

Differentiating the functional contributions of resting connectivity networks to memory decision-making : fMRI support for multi-stage control processes [PDF]

open access: yes, 2015
Neural substrates of memory control are engaged when participants encounter unexpected mnemonic stimuli (e.g., a new word when told to expect an old word).
Cavin, Ian   +5 more
core   +1 more source

Insula Functional Connectivity in Schizophrenia [PDF]

open access: yesSchizophrenia Research, 2019
Abstract The insula is structurally abnormal in schizophrenia, demonstrating robust reductions in gray matter volume, cortical thickness, and altered gyrification during prodromal, early and chronic stages of the illness. Despite compelling structural alterations, less is known about its functional connectivity, limited by studies ...
Julia M. Sheffield   +4 more
openaire   +3 more sources

The Functional Relevance of Task-State Functional Connectivity [PDF]

open access: yesThe Journal of Neuroscience, 2020
Resting-state functional connectivity has provided substantial insight into intrinsic brain network organization, yet the functional importance of task-related change from that intrinsic network organization remains unclear. Indeed, such task-related changes are known to be small, suggesting they may have only minimal functional relevance ...
Michael W. Cole   +3 more
openaire   +2 more sources

Neural activation and functional connectivity during motor imagery of bimanual everyday actions [PDF]

open access: yes, 2012
Bimanual actions impose intermanual coordination demands not present during unimanual actions. We investigated the functional neuroanatomical correlates of these coordination demands in motor imagery (MI) of everyday actions using functional magnetic ...
Sterr, A   +16 more
core   +1 more source

Changes in functional connectivity within the rat striatopallidal axis during global brain activation in vivo [PDF]

open access: yes, 2006
The functional organization of the basal ganglia (BG) is often defined according to one of two opposing schemes. The first proposes multiple, essentially independent channels of information processing.
Sharott, A   +6 more
core   +1 more source

On connected Boolean functions

open access: yesDiscrete Applied Mathematics, 1999
Various classes of Boolean functions are introduced: connected, strongly connected, geodetic, convex, strongly convex and concordant. They are characterized by some properties of the subgraph of the Boolean hypercube induced by the (false) true points of a function.
Ekin, O., Hammer, P. L., Kogan, A.
openaire   +3 more sources

Altered Functional Activity and Functional Connectivity of Seed Regions Based on ALFF Following Acupuncture Treatment in Patients with Stroke Sequelae with Unilateral Limb Numbness [Corrigendum]

open access: yesNeuropsychiatric Disease and Treatment, 2023
Peng J, Su J, Song L, et al. Neuropsychiatr Dis Treat. 2023;19:233–245 The authors have advised there is an error in the author list on page 233. The author order is incorrect.
Peng J   +8 more
doaj  

Independent contributions of structural and functional connectivity: Evidence from a stroke model

open access: yesNetwork Neuroscience, 2021
Altered functional connectivity is related to severity of language impairment in poststroke aphasia. However, it is not clear whether this finding specifically reflects loss of functional coherence, or more generally, is related to decreased structural ...
Lynsey M. Keator   +7 more
doaj   +1 more source

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