Exploring White Matter Microstructure with Symptom Severity and Outcomes Following Deep Brain Stimulation in Tremor Syndromes.

IF 2.5 Q2 CLINICAL NEUROLOGY
Tremor and Other Hyperkinetic Movements Pub Date : 2024-08-28 eCollection Date: 2024-01-01 DOI:10.5334/tohm.904
Luke Andrews, Simon Keller, Corey Ratcliffe, Jibril Osman-Farah, Hilary Shepherd, Maneesh Bhojak, Antonella Macerollo
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引用次数: 0

Abstract

Background: Essential tremor (ET) and dystonic tremor (DT) are movement disorders that cause debilitating symptoms, significantly impacting daily activities and quality of life. A poor understanding of their pathophysiology, as well as the mediators of clinical outcomes following deep brain stimulation (DBS), highlights the need for biomarkers to accurately characterise and optimally treat patients.

Objectives: We assessed the white matter microstructure of pathways implicated in the pathophysiology and therapeutic intervention in a retrospective cohort of patients with DT (n = 17) and ET (n = 19). We aimed to identity associations between white matter microstructure, upper limb tremor severity, and tremor improvement following DBS.

Methods: A fixel-based analysis pipeline was implemented to investigate white matter microstructural metrics in the whole brain, cerebello-thalamic pathways and tracts connected to stimulation volumes following DBS. Associations with preoperative and postoperative severity were analysed within each disorder group and across combined disorder groups.

Results: DBS led to significant improvements in both groups. No group differences in stimulation positions were identified. When white matter microstructural data was aligned according to the maximally affected upper limb, increased fiber density, and combined fiber density & cross-section of fixels in the left cerebellum were associated with greater tremor severity across DT and ET patients. White matter microstructure did not show associations with postoperative changes in cerebello-thalamic pathways, or tracts connected to stimulation volumes.

Discussion: Diffusion changes of the cerebellum are associated with the severity of upper limb tremor and appear to overlap in essential or dystonic tremor disorders.

探索震颤综合征患者脑深部刺激后白质微结构与症状严重程度和疗效的关系。
背景:本质性震颤(ET)和肌强直性震颤(DT)是一种运动障碍疾病,会导致衰弱症状,严重影响日常活动和生活质量。人们对这两种疾病的病理生理学以及深部脑刺激(DBS)后临床结果的介导因素知之甚少,因此需要生物标志物来准确描述患者的特征并对其进行最佳治疗:我们评估了 DT(17 人)和 ET(19 人)患者回顾性队列中与病理生理学和治疗干预有关的通路的白质微结构。我们旨在确定白质微结构、上肢震颤严重程度和 DBS 治疗后震颤改善之间的关联:方法:我们采用了基于固定颗粒的分析管道来研究 DBS 术后全脑、小脑-丘脑通路以及与刺激量相连的束的白质微结构指标。分析了各失调组和合并失调组与术前和术后严重程度的关系:结果:DBS 使两组患者的病情均有明显改善。结果:DBS 使两组患者的病情都得到了明显改善,但没有发现刺激位置的组间差异。根据受影响最大的上肢排列白质微观结构数据时,左侧小脑纤维密度的增加、纤维密度和定点横截面的合并与 DT 和 ET 患者震颤严重程度的增加有关。白质微观结构与术后小脑-丘脑通路或与刺激量相连的束的变化没有关联:讨论:小脑的弥散变化与上肢震颤的严重程度有关,并且似乎与本质性震颤或肌张力震颤疾病重叠。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
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来源期刊
CiteScore
4.00
自引率
4.50%
发文量
31
审稿时长
6 weeks
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