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arXiv 1601.07574q-bio.NCphysics.data-an
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小鼠脑内功能连接的层次组织:一种复杂网络方法

Hierarchical organization of functional connectivity in the mouse brain: a complex network approach

Giampiero Bardella, Angelo Bifone, Andrea Gabrielli, Alessandro Gozzi, Tiziano Squartini

摘要:

本文从复杂网络理论的角度对脑功能连接的研究做出了贡献。更具体地说,我们应用图论分析提供证据的模块化结构的小鼠大脑,并阐明其层次结构。我们提出了一种新的渗流分析,我们将我们的方法从41只小鼠的静息状态功能性MRI数据集的分析。这种方法揭示了一个强大的层次结构的模块持续在不同的主题。重要的是,我们测试这种方法对统计基准(或空模型),它只限制经验相关性的分布。我们的研究结果明确表明,小鼠大脑模块化结构的层次特征并不是简单地编码到这个低阶约束中。最后,我们通过计算最小生成森林来研究小鼠大脑的模块化结构,这是一种识别具有最强内部相关性的子网络的技术。这种方法代表了一种更快的替代其他社区检测方法,并提供了一种手段来排名模块的基础上,他们的内部边缘的强度。

英文摘要:

This paper represents a contribution to the study of the brain functional connectivity from the perspective of complex networks theory. More specifically, we apply graph theoretical analyses to provide evidence of the modular structure of the mouse brain and to shed light on its hierarchical organization. We propose a novel percolation analysis and we apply our approach to the analysis of a resting-state functional MRI data set from 41 mice. This approach reveals a robust hierarchical structure of modules persistent across different subjects. Importantly, we test this approach against a statistical benchmark (or null model) which constrains only the distributions of empirical correlations. Our results unambiguously show that the hierarchical character of the mouse brain modular structure is not trivially encoded into this lower-order constraint. Finally, we investigate the modular structure of the mouse brain by computing the Minimal Spanning Forest, a technique that identifies subnetworks characterized by the strongest internal correlations. This approach represents a faster alternative to other community detection methods and provides a means to rank modules on the basis of the strength of their internal edges.

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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