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Connectivity functions and polymatroids

Advances in Applied Mathematics, 2016
A {\em connectivity function on} a set $E$ is a function $ :2^E\rightarrow \mathbb R$ such that $ (\emptyset)=0$, that $ (X)= (E-X)$ for all $X\subseteq E$ and that $ (X\cap Y)+ (X\cup Y)\leq (X)+ (Y)$ for all $X,Y \subseteq E$. Graphs, matroids and, more generally, polymatroids have associated connectivity functions.
Susan Jowett, Geoff Whittle, Songbao Mo
openaire   +3 more sources

Exercise Training and Functional Connectivity Changes in Mild Cognitive Empairment and Healthy Elders [PDF]

, 2016
Background: Effective interventions are needed to improve brain function in mild cognitive impairment (MCI), an early stage of Alzheimer’s disease (AD).
Alfini, Alfonso J., Carson, J. Smith, Chirles, Theresa J., Nielson, Kristy A., Reiter, Katherine, Weiss, Lauren R.   +5 more
core   +2 more sources

Globally weaker and topologically different: resting-state connectivity in youth with autism

Molecular Autism, 2017
Background There is a lack of agreement about functional connectivity differences in individuals with autism spectrum disorder (ASD). Studies using absolute strength have found reduced connectivity, while those using relative strength––a measure of ...
Benjamin E. Yerys, John D. Herrington, Theodore D. Satterthwaite, Lisa Guy, Robert T. Schultz, Danielle S. Bassett   +5 more
doaj   +1 more source

Revisiting correlation-based functional connectivity and its relationship with structural connectivity

Network Neuroscience, 2020
Patterns of brain structural connectivity (SC) and functional connectivity (FC) are known to be related. In SC-FC comparisons, FC has classically been evaluated from correlations between functional time series, and more recently from partial correlations
Raphaël Liégeois, A. Santos, V. Matta, D. Van de Ville, A. H. Sayed   +4 more
semanticscholar   +1 more source

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]

Neuropsychiatric 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, Su J, Song L, Lv Q, Gao Y, Chang J, Zhang H, Zou Y, Chen X   +8 more
doaj  

Cerebro-cerebellar connectivity is increased in primary lateral sclerosis

NeuroImage: Clinical, 2015
Increased functional connectivity in resting state networks was found in several studies of patients with motor neuron disorders, although diffusion tensor imaging studies consistently show loss of white matter integrity.
Avner Meoded, Arthur E. Morrissette, Rohan Katipally, Olivia Schanz, Stephen J. Gotts, Mary Kay Floeter   +5 more
doaj   +1 more source

Vascular risk factors are associated with a decline in resting-state functional connectivity in cognitively unimpaired individuals at risk for Alzheimer's disease

NeuroImage, 2021
Resting-state functional connectivity is suggested to be cross-sectionally associated with both vascular burden and Alzheimer's disease (AD) pathology. However, evidence is lacking regarding longitudinal changes in functional connectivity.
Theresa Köbe, Alexa Pichet Binette, Jacob W. Vogel, Pierre-François Meyer, John C.S. Breitner, Judes Poirier, Sylvia Villeneuve   +6 more
doaj   +1 more source

Resting state connectivity and cognitive performance in adults with cerebral autosomal-dominant arteriopathy with subcortical infarcts and leukoencephalopathy [PDF]

, 2016
Cognitive impairment is an inevitable feature of cerebral autosomal-dominant arteriopathy with subcortical infarcts and leukoencephalopathy (CADASIL), affecting executive function, attention and processing speed from an early stage.
Cullen, Breda, Kalladka, Dheeraj, Krishnadas, Rajeev, López-González, Maria R., Moreton, Fiona C., Muir, Keith W., Santosh, Celestine, Schwarzbauer, Christian, Stringer, Michael S.   +8 more
core   +1 more source

Rethinking Measures of Functional Connectivity via Feature Extraction

Scientific Reports, 2020
Functional magnetic resonance imaging (fMRI)-based functional connectivity (FC) commonly characterizes the functional connections in the brain. Conventional quantification of FC by Pearson's correlation captures linear, time-domain dependencies among ...
R. Mohanty, W. Sethares, Veena A. Nair, V. Prabhakaran   +3 more
semanticscholar   +1 more source

The functional logic of corticostriatal connections [PDF]

Brain Structure and Function, 2016
Unidirectional connections from the cortex to the matrix of the corpus striatum initiate the cortico-basal ganglia (BG)-thalamocortical loop, thought to be important in momentary action selection and in longer-term fine tuning of behavioural repertoire; a discrete set of striatal compartments, striosomes, has the complementary role of registering or ...
Stewart Shipp, Stewart Shipp
openaire   +3 more sources