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BNST-insula structural connectivity in humans
NeuroImage ( IF 5.7 ) Pub Date : 2020-04-01 , DOI: 10.1016/j.neuroimage.2020.116555
Elizabeth A Flook 1 , Brandee Feola 2 , Suzanne N Avery 2 , Danny G Winder 3 , Neil D Woodward 2 , Stephan Heckers 2 , Jennifer Urbano Blackford 4
Affiliation  

The bed nucleus of the stria terminalis (BNST) is emerging as a critical region in multiple psychiatric disorders including anxiety, PTSD, and alcohol and substance use disorders. In conjunction with growing knowledge of the BNST, an increasing number of studies examine connections of the BNST and how those connections impact BNST function. The importance of this BNST network is highlighted by rodent studies demonstrating that projections from other brain regions regulate BNST activity and influence BNST-related behavior. While many animal and human studies replicate the components of the BNST network, to date, structural connections between the BNST and insula have only been described in rodents and have yet to be shown in humans. In this study, we used probabilistic tractography to examine BNST-insula structural connectivity in humans. We used two methods of dividing the insula: 1) anterior and posterior insula, to be consistent with much of the existing insula literature; and 2) eight subregions that represent informative cytoarchitectural divisions. We found evidence of a BNST-insula structural connection in humans, with the strongest BNST connectivity localized to the anteroventral insula, a region of agranular cortex. BNST-insula connectivity differed by hemisphere and was moderated by sex. These results translate rodent findings to humans and lay an important foundation for future studies examining the role of BNST-insula pathways in psychiatric disorders.

中文翻译:

人类 BNST-insula 结构连通性

终纹床核 (BNST) 正在成为多种精神疾病的关键区域,包括焦虑、创伤后应激障碍、酒精和物质使用障碍。随着对 B​​NST 的了解不断增加,越来越多的研究检查了 BNST 的连接以及这些连接如何影响 BNST 功能。啮齿动物研究强调了这个 BNST 网络的重要性,表明来自其他大脑区域的投射调节 BNST 活动并影响 BNST 相关行为。虽然许多动物和人类研究复制了 BNST 网络的组成部分,但迄今为止,BNST 和脑岛之间的结构连接仅在啮齿动物中得到描述,尚未在人类中得到证实。在这项研究中,我们使用概率纤维束成像来检查人类的 BNST-insula 结构连通性。我们使用了两种划分脑岛的方法:1)前脑岛和后脑岛,与现有的大部分脑岛文献一致;和 2) 代表信息细胞结构划分的八个子区域。我们发现了人类 BNST 与岛叶结构连接的证据,其中最强的 BNST 连接位于前腹岛岛,这是一个无颗粒皮质区域。BNST-insula 连接因半球而异,并受性别调节。这些结果将啮齿动物的发现转化为人类,并为未来研究 BNST-insula 通路在精神疾病中的作用奠定重要基础。我们发现了人类 BNST 与岛叶结构连接的证据,最强的 BNST 连接位于前腹岛岛,这是一个无颗粒皮质区域。BNST-insula 连接因半球而异,并受性别调节。这些结果将啮齿动物的发现转化为人类,并为未来研究 BNST-insula 通路在精神疾病中的作用奠定重要基础。我们发现了人类 BNST 与岛叶结构连接的证据,其中最强的 BNST 连接位于前腹岛岛,这是一个无颗粒皮质区域。BNST-insula 连接因半球而异,并受性别调节。这些结果将啮齿动物的发现转化为人类,并为未来研究 BNST-insula 通路在精神疾病中的作用奠定重要基础。
更新日期:2020-04-01
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