Results 241 to 250 of about 302,708 (266)

Abnormal functional connectivity density in psychogenic non-epileptic seizures

Epilepsy Research, 2014
Psychogenic non-epileptic seizures (PNES) are paroxysmal behaviors that resemble epileptic seizures but lack abnormal electrical activity. Some neuroimaging studies have reported that PNES exhibits aberrant functional connectivity in specific brain networks.
Jurong, Ding, Dongmei, An, Wei, Liao, Guorong, Wu, Qiang, Xu, Dong, Zhou, Huafu, Chen   +6 more
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Functional connectivity density abnormalities and anxiety in primary insomnia patients

Brain Imaging and Behavior, 2020
Primary insomnia (PI) is strongly associated with emotional dysregulation. However, the neurobiological pathology of the association between PI and emotional dysregulation is limited. Previous studies have indicated an impact of PI on the emotional regulatory system, but the specificity of this finding remains to be confirmed.
Yifei, Zhu, Xumeng, Zhao, Hua, Yin, Ming, Zhang   +3 more
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Disrupted functional connectivity density in irritable bowel syndrome patients

Brain Imaging and Behavior, 2016
Irritable bowel syndrome (IBS) is a common functional gastrointestinal disorder resulting from a dysregulation of the brain-gut axis. However, its exact neural substrate still remains unclear. This study investigated the changes of intrinsic whole brain functional connectivity pattern in IBS using functional connectivity density (FCD).
Yifei, Weng, Rongfeng, Qi, Chang, Liu, Jun, Ke, Qiang, Xu, Fangyu, Wang, Long Jiang, Zhang, Guang Ming, Lu   +7 more
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Abnormal Functional Connectivity Density in Post-traumatic Stress Disorder

Brain Topography, 2016
Post-traumatic stress disorder (PTSD) is a psychiatric disorder that occurs in individuals who have experienced life-threatening mental traumas. Previous neuroimaging studies have indicated that the pathology of PTSD may be associated with the abnormal functional integration among brain regions.
Youxue, Zhang, Bing, Xie, Heng, Chen, Meiling, Li, Feng, Liu, Huafu, Chen   +5 more
openaire   +2 more sources

Dispersion interactions in density-functional theory: An adiabatic-connection analysis

The Journal of Chemical Physics, 2011
We present an analysis of the dispersion interaction energy and forces in density-functional theory from the point of view of the adiabatic connection between the Kohn–Sham non-interacting and fully interacting systems. Accurate coupled-cluster singles-doubles-perturbative-triples [CCSD(T)] densities are computed for the helium dimer and used to ...
Strømsheim, M., Kumar, N., CORIANI, Sonia, Sagvolden, E., Teale, A. M., Helgaker, T.   +5 more
openaire   +4 more sources

Generalized adiabatic connection in density functional theory

The Journal of Chemical Physics, 1998
A generalized adiabatic connection is developed for density functional theory. The method extends the well-known adiabatic connection formula and provides a general link between the Kohn–Sham and the physical system. When the complimentary error function is used as a special case, the expression for the exchange-correlation functional does not have the
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Abnormal dynamics of functional connectivity density and effective connectivity in overactive bladder

Neurourology and Urodynamics
AbstractPurposeThe study aims to analyze alterations in dynamic functional connectivity density (dFCD) and effective connectivity (dEC) patterns using functional magnetic resonance imaging (fMRI), hypothesizing that overactive bladder (OAB) patients will exhibit distinct dFCD and dEC patterns, reflecting altered neural communication underlying the OAB ...
Zuo Long, Wang Shuangkun, Tian Tian, Gu Hua, Wang Biao   +4 more
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Altered functional connectivity density in major depressive disorder at rest

European Archives of Psychiatry and Clinical Neuroscience, 2015
Major depressive disorder is characterized by abnormal brain connectivity at rest. Currently, most studies investigating resting-state activity rely on a priori restrictions on specific networks or seed regions, which may bias observations. We hence sought to elicit functional alterations in a hypothesis-free approach.
Bin, Zhang, Meng, Li, Wen, Qin, Liliana Ramona, Demenescu, Coraline Danielle, Metzger, Bernhard, Bogerts, Chunshui, Yu, Martin, Walter   +7 more
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Differences in functional connectivity density among subtypes of schizophrenic auditory hallucination

Brain Imaging and Behavior, 2020
This study aimed to investigate alterations in brain function among different subtypes of auditory hallucinations (AH) in drug-naïve first episode schizophrenia patients. We recruited 20 patients with drug-naïve first episode schizophrenia who had constant commanding and commenting auditory verbal hallucinations (CCCAVH), 15 drug-naïve first episode ...
Chuanjun Zhuo, Gongying Li, Feng Ji, Ce Chen, Deguo Jiang, Xiaodong Lin, Yong Xu, Hongjun Tian, Lina Wang, Chunhua Zhou, Xiao Lin   +10 more
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Local-density approximation, hierarchy of equations, functional expansion, and adiabatic connection in current-density-functional theory

Physical Review A, 1996
Identities and approximations are proposed for the current-density-functional theory. Based on the virial theorem and the scaling properties of the kinetic and exchange energy density functionals, when local and variable-separation assumptions are made, local formulas for these functionals are obtained.
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