نتایج جستجو برای: default mode network dmn

تعداد نتایج: 892432  

2017
Benjamin Clemens Lisa Wagels Magdalena Bauchmüller Rene Bergs Ute Habel Nils Kohn

Stress affects the brain at a network level: the salience network is supposedly upregulated, while at the same time the executive control network is downregulated. While theoretically described, the effects in the aftermath of stress have thus far not been tested empirically. Here, we compared for the first time resting-state functional connectivity in a large sample of healthy volunteers befor...

2016
Elizabeth B. Liddle Chris Hollis Martin J. Batty Madeleine J. Groom John J. Totman Mario Liotti Peter F. Liddle

Background: Deficits characteristic of Attention Deficit/Hyperactivity Disorder (ADHD), including poor attention and inhibitory control, are at least partially alleviated by factors that increase engagement of attention, suggesting a hypodopaminergic reward deficit. Lapses of attention are associated with attenuated deactivation of the Default Mode Network (DMN), a distributed brain system norm...

Journal: :Proceedings of the National Academy of Sciences of the United States of America 2012
Hanbing Lu Qihong Zou Hong Gu Marcus E Raichle Elliot A Stein Yihong Yang

The default mode network (DMN) in humans has been suggested to support a variety of cognitive functions and has been implicated in an array of neuropsychological disorders. However, its function(s) remains poorly understood. We show that rats possess a DMN that is broadly similar to the DMNs of nonhuman primates and humans. Our data suggest that, despite the distinct evolutionary paths between ...

Journal: :Mathematics 2022

Various studies suggest that the network deficit in default mode (DMN) is prevalent Alzheimer’s disease (AD) and mild cognitive impairment (MCI). Besides DMN, some reveal alteration occurs salience motor networks large scale network. In this study we performed classification of AD MCI from healthy control considering alterations DMN. Thus, constructed brain functional magnetic resonance (fMR) i...

Journal: :NeuroImage 2014
Xiaoqian J. Chai Noa Ofen John D. E. Gabrieli Susan L. Whitfield-Gabrieli

Task-induced deactivation of the default-mode network (DMN) has been associated in adults with successful episodic memory formation, possibly as a mechanism to focus allocation of mental resources for successful encoding of external stimuli. We investigated developmental changes of deactivation of the DMN (posterior cingulate, medial prefrontal, and bilateral lateral parietal cortices) during e...

Journal: :NeuroImage 2012
Jack A. De Havas Sarayu Parimal Soon Chun Siong Michael W. L. Chee

Sleep deprivation (SD) can alter extrinsic, task-related fMRI signal involved in attention, memory and executive function. However, its effects on intrinsic low-frequency connectivity within the Default Mode Network (DMN) and its related anti-correlated network (ACN) have not been well characterized. We investigated the effect of SD on functional connectivity within the DMN, and on DMN-ACN anti...

2014
Xia Wu Xinyu Yu Li Yao Rui Li

Functional magnetic resonance imaging (fMRI) studies have converged to reveal the default mode network (DMN), a constellation of regions that display co-activation during resting-state but co-deactivation during attention-demanding tasks in the brain. Here, we employed a Bayesian network (BN) analysis method to construct a directed effective connectivity model of the DMN and compared the organi...

Journal: :Journal of psychiatry & neuroscience : JPN 2011
Judith K Daniels Paul Frewen Margaret C McKinnon Ruth A Lanius

Recently, altered default mode network (DMN) connectivity in individuals with posttraumatic stress disorder (PTSD) has been related to prolonged childhood maltreatment. An emerging body of literature also describes the developmental differentiation of the DMN in healthy children. Critically, developmental changes in the DMN may parallel those observed in other associated domains, including self...

2017
Ying Liang Zhenzhen Li Jing Wei Chunlin Li Xu Zhang Alzheimer's Disease Neuroimaging Initiative

We applied resting-state functional magnetic resonance imaging (fMRI) to examine the Apolipoprotein E (ApoE) ε4 allele effects on functional connectivity of the default mode network (DMN) and the salience network (SN). Considering the frequency specific effects of functional connectivity, we decomposed the brain network time courses into two bands: 0.01-0.027 Hz and 0.027-0.08 Hz. All scans wer...

2012
Michael D Spencer Lindsay R Chura Rosemary J Holt John Suckling Andrew J Calder Edward T Bullmore Simon Baron-Cohen

UNLABELLED BACKGROUND Reduced activity during cognitively demanding tasks has been reported in the default mode network in typically developing controls and individuals with autism. However, no study has investigated the default mode network (DMN) in first-degree relatives of those with autism (such as siblings) and it is not known whether atypical activation of the DMN is specific to autism...

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