نتایج جستجو برای: default mode network dmn

تعداد نتایج: 892432  

Journal: :Psychoradiology 2023

Abstract Background It has been postulated that musicianship can lead to enhanced brain and cognitive reserve, but the neural mechanisms of this effect have poorly understood. Lifelong professional in conjunction with novel imaging techniques offers a unique opportunity examine network differences between musicians matched controls. Objective In study we aim investigate how resting-state functi...

2016
Jiu Chen

Neuroimaging evidence of disconnection syndrome of Alzheimer’s disease (AD) is extremely fascinating. In the study by Brier et al.,[1] they examined resting-state functional-connectivity magnetic resonance imaging (rs-fcMRI) in 5 functionally defined brain networks: default mode network (DMN), executive control network (CON), salience network (SAL), dorsal attention network (DAN), and sensory-m...

2011
Feng Bai David R. Watson Yongmei Shi Yi Wang Chunxian Yue YuhuanTeng Di Wu Yonggui Yuan Zhijun Zhang

BACKGROUND Deficits of the default mode network (DMN) have been demonstrated in subjects with amnestic type mild cognitive impairment (aMCI) who have a high risk of developing Alzheimer's disease (AD). However, no longitudinal study of this network has been reported in aMCI. Identifying links between development of DMN and aMCI progression would be of considerable value in understanding brain c...

2014
Richard E. Boyatzis Kylie Rochford Anthony I. Jack

The emergence of two distinct leadership roles, the task leader and the socio-emotional leader, has been documented in the leadership literature since the 1950s. Recent research in neuroscience suggests that the division between task-oriented and socio-emotional-oriented roles derives from a fundamental feature of our neurobiology: an antagonistic relationship between two large-scale cortical n...

Mozafar Hosseini Nejad, Sara Ramezani, Shahrokh Yousefzadeh-Chabok, Zoheir Reihanian,

Traumatic Brain Injury (TBI) in all degrees of injury severity mainly induces deviant cognitive, emotional and behavioral alterations that lead to their respective disorders. This brief overview strives to define the variables that determine the risk of occurrence of these disorders and to describe the common patterns of these disorders and their relevant neuropathogenetic mechanism(s). In addi...

2016
Houliang Wang Wenbin Guo Feng Liu Jindong Chen Renrong Wu Zhikun Zhang Miaoyu Yu Lehua Li Jingping Zhao

The cerebellum has been proven to be connected to the brain network, as in the default-mode network (DMN), among healthy subjects and patients with psychiatric disorders. However, whether or not abnormal cerebellar DMN connectivity exists and what its clinical significance is among drug-naive patients with somatization disorder (SD) at rest remain unclear.A total of 25 drug-naive patients with ...

2011
Willem Huijbers Cyriel M. A. Pennartz Roberto Cabeza Sander M. Daselaar

The brain's default mode network (DMN) is activated during internally-oriented tasks and shows strong coherence in spontaneous rest activity. Despite a surge of recent interest, the functional role of the DMN remains poorly understood. Interestingly, the DMN activates during retrieval of past events but deactivates during encoding of novel events into memory. One hypothesis is that these opposi...

Journal: :The Journal of neuroscience : the official journal of the Society for Neuroscience 2013
Yuzheng Hu Xi Chen Hong Gu Yihong Yang

Deactivation of the human brain's default mode network (DMN) is regarded as suppression of endogenous activity to support exogenous task-related processes. This phenomenon has important functional relevance and insufficient DMN deactivation has been implicated in several neuropsychiatric disorders. However, the neurochemical mechanism of the DMN's deactivation remains largely unknown. In the pr...

2015
Rozalyn Simon Maria Engström

The default mode network (DMN) is a group of anatomically separate regions in the brain found to have synchronized patterns of activation in functional magnetic resonance imaging (fMRI). Mentation associated with the DMN includes processes such as mind wandering, autobiographical memory, self-reflective thought, envisioning the future, and considering the perspective of others. Abnormalities in...

2012
Roberto Esposito Peter A. Mattei Chiara Briganti Gian Luca Romani Armando Tartaro Massimo Caulo

PURPOSE The aim of the study was to evaluate connectivity modifications in the Default Mode Network (DMN) in patients with cerebral glioma, and to correlate these modifications to tumor characteristics. METHODS Twenty-four patients with a left-hemisphere cerebral tumor (14 grade II and 10 grade IV gliomas) and 14 healthy age-matched right-hand volunteers were enrolled in the study. Subjects u...

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