健康和偏头痛患者白质结构网络中布线成本与网络拓扑结构之间的权衡。
The trade-off between wiring cost and network topology in white matter structural networks in health and migraine.
机构信息
School of Life Sciences and Technology, Xidian University, Xi'an 710071, China.
出版信息
Exp Neurol. 2013 Oct;248:196-204. doi: 10.1016/j.expneurol.2013.04.012. Epub 2013 May 3.
The human brain organization of cortical networks has optimized trade-off architecture for the economical minimization of connection distance and maximizing valuable topological properties; however, whether this network configuration is disrupted in chronic migraine remains unknown. Here, employing the diffusion tensor imaging and graph theory approaches to construct white matter networks in 26 patients with migraine (PM) and 26 gender-matched healthy controls (HC), we investigated relationships between structural connectivity, cortical network architecture and anatomical distance in the two groups separately. Compared with the HC group, the patients showed longer global distance connection in PM, with proportionally less short-distance and more medium-distance; correspondingly, the patients showed abnormal global topology in their structural networks, mainly presented as a higher clustering coefficient. Moreover, the abnormal association between these two network features was also found. Intriguingly, the network measure that combined the nodal anatomical distance and network topology could distinguish PM from HC with high accuracy of 90.4%. We also demonstrated a high reproducibility of our findings across different parcellation schemes. Our results demonstrated that long-term migraine may result in a abnormal optimization of a trade-off between wiring cost and network topology in white matter structural networks and highlights the potential for combining spatial and topological aspects as a network marker, which may provide valuable insights into the understanding of brain network reorganization that could be attributed to the underlying pathophysiology resulting from migraine.
人类大脑皮质网络的组织具有优化的权衡架构,以实现连接距离的经济最小化和有价值拓扑属性的最大化;然而,慢性偏头痛是否会破坏这种网络结构尚不清楚。在这里,我们采用弥散张量成像和图论方法,分别在 26 名偏头痛患者(PM)和 26 名性别匹配的健康对照者(HC)中构建了白质网络,研究了两组之间结构连接、皮质网络结构和解剖距离之间的关系。与 HC 组相比,PM 患者的全局距离连接更长,短距离连接比例较小,中距离连接比例较大;相应地,PM 患者的结构网络表现出异常的全局拓扑结构,主要表现为更高的聚类系数。此外,还发现了这两种网络特征之间的异常关联。有趣的是,将节点解剖距离和网络拓扑结合起来的网络指标能够以 90.4%的高精度将 PM 与 HC 区分开来。我们还证明了我们的发现具有很高的可重复性,适用于不同的分割方案。我们的研究结果表明,长期偏头痛可能导致白质结构网络中布线成本和网络拓扑之间的权衡出现异常优化,并强调了将空间和拓扑方面结合起来作为网络标志物的潜力,这可能为理解偏头痛导致的潜在病理生理学引起的大脑网络重组提供有价值的见解。