نتایج جستجو برای: Default Mode Network (DMN)

تعداد نتایج: 892432  

2015

1016j.brainres. A lack of default network suppression is linked to increased.Heightened distractibility in participants with ADHD as indexed by increased reaction time RT variability has been hypothesized to be due to a failure to suff. Task-related suppression of activation in the default network, including medial. Poor performance on attention-demanding tasks. Tional lag pdf clone software in...

The default-mode network (DMN) is one of the human brain’s networks activated in resting and self-referential thinking states. The nature of this network and its normal or abnormal changes has been the subject of various studies. The aim of this study was to systematical review and integrating the findings of that studies focused on the relationship of DMN with mental disorders and aging-induce...

Journal: :Japanese Journal of Physiological Psychology and Psychophysiology 2013

Journal: :Archives italiennes de biologie 2009
F Esposito A Aragri V Latorre T Popolizio T Scarabino S Cirillo E Marciano G Tedeschi F Di Salle

The "default-mode" network is an ensemble of cortical regions that are typically deactivated during demanding cognitive tasks in functional magnetic resonance imaging (fMRI) studies. Using functional connectivity analysis, this network can be studied as a "stand-alone" brain system whose functional role is supposed to consist in the dynamic control of intrinsic processing activities like attent...

Journal: :The Journal of neuroscience : the official journal of the Society for Neuroscience 2009
Angela R Laird Simon B Eickhoff Karl Li Donald A Robin David C Glahn Peter T Fox

The default mode network (DMN) comprises a set of regions that exhibit ongoing, intrinsic activity in the resting state and task-related decreases in activity across a range of paradigms. However, DMN regions have also been reported as task-related increases, either independently or coactivated with other regions in the network. Cognitive subtractions and the use of low-level baseline condition...

2014
Ibrahim Eid Hassan Saleh

Graph theory defines a graph as a set of nodes (in this study, regions of interest, ROIs) and edges (functional connections). The present study aims to explore the topological properties of the Default Mode Network (DMN) in the framework of graph theory and the alterations induced on it by a cognitive task, with respect to the resting condition. The principal finding of the present study is tha...

2011
Jaymin Upadhyay Scott J. Baker Prasant Chandran Loan Miller Younglim Lee Gerard J. Marek Unal Sakoglu Chih-Liang Chin Feng Luo Gerard B. Fox Mark Day

During wakefulness and in absence of performing tasks or sensory processing, the default-mode network (DMN), an intrinsic central nervous system (CNS) network, is in an active state. Non-human primate and human CNS imaging studies have identified the DMN in these two species. Clinical imaging studies have shown that the pattern of activity within the DMN is often modulated in various disease st...

Journal: :Psychiatry research 2013
Gianluca Mingoia Kerstin Langbein Maren Dietzek Gerd Wagner Stefan Smesny Sigrid Scherpiet Raka Maitra Jürgen R Reichenbach Ralf G M Schlösser Christian Gaser Heinrich Sauer Igor Nenadic

Probabilistic independent component analysis was applied to identify the default mode network (DMN) in resting state data obtained with functional magnetic resonance imaging from 25 DSM-IV schizophrenia and 25 matched healthy subjects. Power spectrum analysis showed a significant diagnosis × frequency interaction and higher power in one frequency band, indicating an alteration of DMN frequency ...

Journal: :Human brain mapping 2009
Lucina Q Uddin A M Kelly Bharat B Biswal F Xavier Castellanos Michael P Milham

The default mode network (DMN), based in ventromedial prefrontal cortex (vmPFC) and posterior cingulate cortex (PCC), exhibits higher metabolic activity at rest than during performance of externally oriented cognitive tasks. Recent studies have suggested that competitive relationships between the DMN and various task-positive networks involved in task performance are intrinsically represented i...

2013
Tuomo Starck Juha Nikkinen Jukka Rahko Jukka Remes Tuula Hurtig Helena Haapsamo Katja Jussila Sanna Kuusikko-Gauffin Marja-Leena Mattila Eira Jansson-Verkasalo David L. Pauls Hanna Ebeling Irma Moilanen Osmo Tervonen Vesa J. Kiviniemi

In resting state functional magnetic resonance imaging (fMRI) studies of autism spectrum disorders (ASDs) decreased frontal-posterior functional connectivity is a persistent finding. However, the picture of the default mode network (DMN) hypoconnectivity remains incomplete. In addition, the functional connectivity analyses have been shown to be susceptible even to subtle motion. DMN hypoconnect...

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