Results 21 to 30 of about 80,806 (260)

Age-related changes in processing speed: unique contributions of cerebellar and prefrontal cortex

Frontiers in Human Neuroscience, 2010
Age-related declines in processing speed are hypothesized to underlie the widespread changes in cognition experienced by older adults. We used a structural covariance approach to identify putative neural networks that underlie age-related structural ...
Mark A Eckert, Noam I Keren, Donna R Roberts, Vince D Calhoun, Kelly C Harris   +4 more
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Structural covariance networks across the life span, from 6 to 94 years of age [PDF]

Network Neuroscience, 2017
Structural covariance examines covariation of gray matter morphology between brain regions and across individuals. Despite significant interest in the influence of age on structural covariance patterns, no study to date has provided a complete life span ...
Elizabeth DuPre, R. Nathan Spreng
doaj   +1 more source

Divergent Connectivity Changes in Gray Matter Structural Covariance Networks in Subjective Cognitive Decline, Amnestic Mild Cognitive Impairment, and Alzheimer’s Disease

Frontiers in Aging Neuroscience, 2021
Alzheimer’s disease (AD) has a long preclinical stage that can last for decades prior to progressing toward amnestic mild cognitive impairment (aMCI) and/or dementia.
Zhenrong Fu, Mingyan Zhao, Mingyan Zhao, Yirong He, Xuetong Wang, Jiadong Lu, Shaoxian Li, Xin Li, Xin Li, Guixia Kang, Ying Han, Ying Han, Ying Han, Ying Han, Shuyu Li   +14 more
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Covariant spin structure [PDF]

Journal of Mathematical Physics, 1998
Dirac fermion fields associated with different tetrad gravitational fields and under general covariant transformations are described by sections of the composite bundle S→Σ→X4, which is both the Dirac spinor bundle over the tetrad bundle Σ and the natural one over X4. As a natural bundle, S→X4 admits general covariant transformations which are those of
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Structural Covariance Changes of Anterior and Posterior Hippocampus During Musical Training in Young Adults

Frontiers in Neuroanatomy, 2020
Musical training can induce the functional and structural changes of the hippocampus. The hippocampus is not a homogeneous structure which can be divided into anterior and posterior parts along its longitudinal axis, and the whole-brain structural ...
Panfei Guo, Panfei Guo, Qiongling Li, Qiongling Li, Xuetong Wang, Xuetong Wang, Xinwei Li, Xinwei Li, Shaoyi Wang, Shaoyi Wang, Yongqi Xie, Yongqi Xie, Yachao Xie, Yachao Xie, Zhenrong Fu, Zhenrong Fu, Xiaohui Zhang, Xiaohui Zhang, Shuyu Li, Shuyu Li   +19 more
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Connectivity Alterations in Vascular Parkinsonism: A Structural Covariance Study

Applied Sciences, 2022
This study aimed to investigate the structural covariance between the striatum and large-scale brain regions in patients with vascular parkinsonism (VP) compared to Parkinson’s disease (PD) and control subjects, and then explore the relationship between ...
Fabiana Novellino, Maria Salsone, Roberta Riccelli, Carmelina Chiriaco, Giuseppe Argirò, Andrea Quattrone, José L. M. Madrigal, Luigi Ferini Strambi, Aldo Quattrone   +8 more
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Covariance structure estimation with Laplace approximation

Journal of Multivariate Analysis, 2023
Gaussian covariance graph model is a popular model in revealing underlying dependency structures among random variables. A Bayesian approach to the estimation of covariance structures uses priors that force zeros on some off-diagonal entries of covariance matrices and put a positive definite constraint on matrices.
Bongjung Sung, Jaeyong Lee
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Structural Covariance Network Disruption and Functional Compensation in Parkinson’s Disease

Frontiers in Aging Neuroscience, 2020
Purpose: To investigate the structural covariance network disruption in Parkinson’s disease (PD), and explore the functional alterations of disrupted structural covariance network.Methods: A cohort of 100 PD patients and 70 healthy participants underwent
Cheng Zhou, Ting Gao, Tao Guo, Jingjing Wu, Xiaojun Guan, Weiwen Zhou, Peiyu Huang, Min Xuan, Quanquan Gu, Xiaojun Xu, Shunren Xia, Dexing Kong, Jian Wu, Minming Zhang   +13 more
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Brain network changes in adult victims of violence

Frontiers in Psychiatry, 2023
IntroductionStressful experiences such as violence can affect mental health severely. The effects are associated with changes in structural and functional brain networks.
Aliaksandra Shymanskaya, Aliaksandra Shymanskaya, Nils Kohn, Ute Habel, Ute Habel, Lisa Wagels, Lisa Wagels   +6 more
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Structural Covariance Analysis Reveals Differences Between Dancers and Untrained Controls

Frontiers in Human Neuroscience, 2018
Dancers and musicians differ in brain structure from untrained individuals. Structural covariance (SC) analysis can provide further insight into training-associated brain plasticity by evaluating interregional relationships in gray matter (GM) structure.
Falisha J. Karpati, Falisha J. Karpati, Chiara Giacosa, Chiara Giacosa, Nicholas E. V. Foster, Nicholas E. V. Foster, Virginia B. Penhune, Virginia B. Penhune, Krista L. Hyde, Krista L. Hyde, Krista L. Hyde   +10 more
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