Results 21 to 30 of about 253,481 (266)

Nonlinear changes in delayed functional network topology in Alzheimer’s disease: relationship with amyloid and tau pathology

Alzheimer’s Research & Therapy, 2023
Background Alzheimer’s disease is a neurodegenerative disorder associated with the abnormal deposition of pathological processes, such as amyloid-ß and tau, which produces nonlinear changes in the functional connectivity patterns between different brain ...
Mite Mijalkov, Dániel Veréb, Anna Canal-Garcia, Thomas Hinault, Giovanni Volpe, Joana B. Pereira, for the Alzheimer’s Disease Neuroimaging Initiative   +6 more
doaj   +1 more source

White matter substrates of functional connectivity dynamics in the human brain

NeuroImage, 2022
The contribution of structural connectivity to functional connectivity dynamics is still far from being elucidated. Herein, we applied track-weighted dynamic functional connectivity (tw-dFC), a model integrating structural, functional, and dynamic ...
Gianpaolo Antonio Basile, Salvatore Bertino, Victor Nozais, Alessia Bramanti, Rosella Ciurleo, Giuseppe Pio Anastasi, Demetrio Milardi, Alberto Cacciola   +7 more
doaj   +1 more source

Cerebrovascular disease influences functional and structural network connectivity in patients with amnestic mild cognitive impairment and Alzheimer’s disease

Alzheimer’s Research & Therapy, 2018
Background Patients with amnestic mild cognitive impairment (aMCI) and Alzheimer’s disease (AD) show functional and structural connectivity alterations in the default mode network (DMN) while cerebrovascular disease (CeVD) shows functional and structural
Ashwati Vipin, Yng Miin Loke, Siwei Liu, Saima Hilal, Hee Youn Shim, Xin Xu, Boon Yeow Tan, Narayanaswamy Venketasubramanian, Christopher Li-Hsian Chen, Juan Zhou   +9 more
doaj   +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

Neuropsychiatric Disease and Treatment, 2023
Jing Peng,1,* Jiaming Su,2,* Lei Song,1 Qiuyi Lv,1 Ying Gao,1 Jingling Chang,1 Hua Zhang,1 Yihuai Zou,1 Xing Chen3 1Department of Encephalopathy, Dongzhimen Hospital Affiliated to Beijing University of Chinese Medicine, Beijing, People’s Republic ...
Peng J, Su J, Song L, Lv Q, Gao Y, Chang J, Zhang H, Zou Y, Chen X   +8 more
doaj  

Disambiguating brain functional connectivity

NeuroImage, 2018
Functional connectivity (FC) analyses of correlations of neural activity are used extensively in neuroimaging and electrophysiology to gain insights into neural interactions. However, analyses assessing changes in correlation fail to distinguish effects produced by sources as different as changes in neural signal amplitudes or noise levels.
Duff, EP, Makin, T, Cottaar, M, Smith, SM, Woolrich, MW   +4 more
openaire   +4 more sources

Altered Resting Functional Connectivity Is Related to Cognitive Outcome in Males With Moderate-Severe Traumatic Brain Injury

Frontiers in Neurology, 2019
TBI results in significant cognitive impairments and in altered brain functional connectivity. However, no studies explored so far, the relationship between global functional connectivity and cognitive outcome in chronic moderate-severe TBI.
Nikos Konstantinou, Eva Pettemeridou, Eva Pettemeridou, Emmanuel A. Stamatakis, Ioannis Seimenis, Fofi Constantinidou, Fofi Constantinidou   +6 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

Evaluating methods for measuring background connectivity in slow event‐related functional magnetic resonance imaging designs

Brain and Behavior, 2023
Introduction Resting‐state functional magnetic resonance imaging (fMRI) is widely used for measuring functional interactions between brain regions, significantly contributing to our understanding of large‐scale brain networks and brain–behavior ...
Lea E. Frank, Dagmar Zeithamova
doaj   +1 more source

Autism-associated Nf1 deficiency disrupts corticocortical and corticostriatal functional connectivity in human and mouse

Neurobiology of Disease, 2019
Children with the autosomal dominant single gene disorder, neurofibromatosis type 1 (NF1), display multiple structural and functional changes in the central nervous system, resulting in neuropsychological cognitive abnormalities.
Ben Shofty, Eyal Bergmann, Gil Zur, Jad Asleh, Noam Bosak, Alexandra Kavushansky, F. Xavier Castellanos, Liat Ben-Sira, Roger J. Packer, Gilbert L. Vezina, Shlomi Constantini, Maria T. Acosta, Itamar Kahn   +12 more
doaj   +1 more source

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.
Jowett, Susan, Mo, Songbao, Whittle, Geoff   +2 more
openaire   +2 more sources