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颞叶癫痫中大规模活动波传播的改变受皮质厚度组织的影响:一项磁共振成像-高密度脑电图研究

Altered spread of waves of activities at large scale is influenced by cortical thickness organization in temporal lobe epilepsy: a magnetic resonance imaging-high-density electroencephalography study.

作者信息

Duma Gian Marco, Pellegrino Giovanni, Rabuffo Giovanni, Danieli Alberto, Antoniazzi Lisa, Vitale Valerio, Scotto Opipari Raffaella, Bonanni Paolo, Sorrentino Pierpaolo

机构信息

Epilepsy Unit, IRCCS E. Medea Scientific Institute, Conegliano 31015, Italy.

Epilepsy Program, Schulich School of Medicine and Dentistry, Western University, London N6A5C1, Canada.

出版信息

Brain Commun. 2023 Dec 14;6(1):fcad348. doi: 10.1093/braincomms/fcad348. eCollection 2024.

Abstract

Temporal lobe epilepsy is a brain network disorder characterized by alterations at both the structural and the functional levels. It remains unclear how structure and function are related and whether this has any clinical relevance. In the present work, we adopted a novel methodological approach investigating how network structural features influence the large-scale dynamics. The functional network was defined by the spatio-temporal spreading of aperiodic bursts of activations (neuronal avalanches), as observed utilizing high-density electroencephalography in patients with temporal lobe epilepsy. The structural network was modelled as the region-based thickness covariance. Loosely speaking, we quantified the similarity of the cortical thickness of any two brain regions, both across groups and at the individual level, the latter utilizing a novel approach to define the subject-wise structural covariance network. In order to compare the structural and functional networks (at the nodal level), we studied the correlation between the probability that a wave of activity would propagate from a source to a target region and the similarity of the source region thickness as compared with other target brain regions. Building on the recent evidence that large-waves of activities pathologically spread through the epileptogenic network in temporal lobe epilepsy, also during resting state, we hypothesize that the structural cortical organization might influence such altered spatio-temporal dynamics. We observed a stable cluster of structure-function correlation in the bilateral limbic areas across subjects, highlighting group-specific features for left, right and bilateral temporal epilepsy. The involvement of contralateral areas was observed in unilateral temporal lobe epilepsy. We showed that in temporal lobe epilepsy, alterations of structural and functional networks pair in the regions where seizures propagate and are linked to disease severity. In this study, we leveraged on a well-defined model of neurological disease and pushed forward personalization approaches potentially useful in clinical practice. Finally, the methods developed here could be exploited to investigate the relationship between structure-function networks at subject level in other neurological conditions.

摘要

颞叶癫痫是一种脑网络疾病,其特征在于结构和功能水平均发生改变。结构与功能之间的关系以及这是否具有任何临床相关性仍不清楚。在本研究中,我们采用了一种新颖的方法来研究网络结构特征如何影响大规模动态变化。功能网络由非周期性激活爆发(神经元雪崩)的时空传播定义,这是在颞叶癫痫患者中利用高密度脑电图观察到的。结构网络被建模为基于区域的厚度协方差。简单来说,我们在组间和个体水平上量化了任意两个脑区皮质厚度的相似性,后者采用一种新颖的方法来定义个体的结构协方差网络。为了比较结构和功能网络(在节点水平),我们研究了活动波从源区域传播到目标区域的概率与源区域厚度与其他目标脑区的相似性之间的相关性。基于最近的证据,即在颞叶癫痫中,即使在静息状态下,大的活动波也会通过致痫网络进行病理性传播,我们假设皮质结构组织可能会影响这种改变的时空动态变化。我们观察到跨个体的双侧边缘区域存在稳定的结构 - 功能相关簇,突出了左、右和双侧颞叶癫痫的组特异性特征。在单侧颞叶癫痫中观察到对侧区域的参与。我们表明,在颞叶癫痫中,癫痫发作传播区域的结构和功能网络对的改变与疾病严重程度相关。在本研究中,我们利用了一个明确的神经疾病模型,并推进了可能在临床实践中有用的个性化方法。最后,这里开发的方法可用于研究其他神经疾病中个体水平上结构 - 功能网络之间的关系。

https://cdn.ncbi.nlm.nih.gov/pmc/blobs/cf8e/10754317/fde5e73a76f8/fcad348_ga1.jpg

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