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Diffusion Tractography and Graph Theory Analysis Reveal the Disrupted Rich-Club Organization of White Matter Structural Networks in Early Tourette Syndrome Children

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机构: [1]Chinese Acad Sci, Inst Automat, Res Ctr Brain Inspired Intelligence, Beijing 100190, Peoples R China; [2]Univ Chinese Acad Sci, Beijing, Peoples R China; [3]Chinese Acad Sci, Ctr Excellence Brain Sci & Intelligence Technol, Beijing, Peoples R China; [4]Capital Med Univ, Beijing Childrens Hosp, Dept Radiol, 56 Nanlishi Rd, Beijing 100045, Peoples R China; [5]Capital Med Univ, Beijing Childrens Hosp, Dept Neurol, Beijing, Peoples R China
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关键词: Tourette syndrome Diffusion tensor imaging Diffusion tractography Graph theoretical analysis Rich club

摘要:
Tourette syndrome (TS) is a childhood-onset neurobehavioral disorder. At present, the topological disruptions of the whole brain white matter (WM) structural networks remain poorly understood in TS children. Considering the unique position of the topologically central role of densely interconnected brain hubs, namely the rich club regions, therefore, we aimed to investigate whether the rich club regions and their related connections would be particularly vulnerable in early TS children. In our study, we used diffusion tractography and graph theoretical analyses to explore the rich club structures in 44 TS children and 48 healthy children. The structural networks of TS children exhibited significantly increased normalized rich club coefficient, suggesting that TS is characterized by increased structural integrity of this centrally embedded rich club backbone, potentially resulting in increased global communication capacity. In addition, TS children showed a reorganization of rich club regions, as well as significantly increased density and decreased number in feeder connections. Furthermore, the increased rich club coefficients and feeder connections density of TS children were significantly positively correlated to tic severity, indicating that TS may be characterized by a selective alteration of the structural connectivity of the rich club regions, tending to have higher bridging with non-rich club regions, which may increase the integration among tic-related brain circuits with more excitability but less inhibition for information exchanges between highly centered brain regions and peripheral areas. In all, our results suggest the disrupted rich club organization in early TS children and provide structural insights into the brain networks.

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第一作者机构: [1]Chinese Acad Sci, Inst Automat, Res Ctr Brain Inspired Intelligence, Beijing 100190, Peoples R China; [2]Univ Chinese Acad Sci, Beijing, Peoples R China;
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通讯机构: [1]Chinese Acad Sci, Inst Automat, Res Ctr Brain Inspired Intelligence, Beijing 100190, Peoples R China; [2]Univ Chinese Acad Sci, Beijing, Peoples R China; [3]Chinese Acad Sci, Ctr Excellence Brain Sci & Intelligence Technol, Beijing, Peoples R China; [4]Capital Med Univ, Beijing Childrens Hosp, Dept Radiol, 56 Nanlishi Rd, Beijing 100045, Peoples R China;
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