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arXiv 1901.07536q-bio.NCq-bio.QM
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在不同的空间和时间尺度上对大脑网络动力学的控制

The control of brain network dynamics across diverse scales of space and time

Evelyn Tang, Harang Ju, Graham L. Baum, David R. Roalf, Theodore D. Satterthwaite, Fabio Pasqualetti, Danielle S. Bassett

摘要:

人类大脑由不同的区域组成,每个区域都与特定的功能和控制神经动力学的不同倾向相关。然而,这些功能和控制配置文件之间的关系知之甚少,因为是在不同尺度的空间和时间的这种关系的变化。在这里,我们探讨控制和动力学之间的关系,在一个大的社区为基础的样本的年轻人的扩散张量成像数据构建的大脑网络。具体来说,我们探测每个大脑区域的控制特性,并使用拉普拉斯特征谱研究它们与不同空间尺度的动态关系。此外,通过分析区域模式的可控性和分区的模式,我们确定相关的动态是快还是慢,以及它们是否交替或单调。我们发现,促进控制能量上容易的转换的大脑区域与短长度尺度和慢时间尺度上的活动有关。相反,大脑中有助于控制困难过渡的区域与长时间尺度和快时间尺度上的活动有关。基于线性动力学模型,我们的研究结果为不同神经解剖结构区域支持的活动传播和网络控制配置文件提供了简洁的解释。

英文摘要:

The human brain is composed of distinct regions that are each associated with particular functions and distinct propensities for the control of neural dynamics. However, the relation between these functions and control profiles is poorly understood, as is the variation in this relation across diverse scales of space and time. Here we probe the relation between control and dynamics in brain networks constructed from diffusion tensor imaging data in a large community based sample of young adults. Specifically, we probe the control properties of each brain region and investigate their relationship with dynamics across various spatial scales using the Laplacian eigenspectrum. In addition, through analysis of regional modal controllability and partitioning of modes, we determine whether the associated dynamics are fast or slow, as well as whether they are alternating or monotone. We find that brain regions that facilitate the control of energetically easy transitions are associated with activity on short length scales and slow time scales. Conversely, brain regions that facilitate control of difficult transitions are associated with activity on long length scales and fast time scales. Built on linear dynamical models, our results offer parsimonious explanations for the activity propagation and network control profiles supported by regions of differing neuroanatomical structure.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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