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Cortical Functional Connectivity Changes in the Body‐First and Brain‐First Subtypes of Parkinson's Disease
Movement Disorders ( IF 7.4 ) Pub Date : 2024-11-29 , DOI: 10.1002/mds.30071
Matteo Conti, Valentina D'Onofrio, Roberta Bovenzi, Valerio Ferrari, Francesca Di Giuliano, Rocco Cerroni, Mariangela Pierantozzi, Tommaso Schirinzi, Nicola Biagio Mercuri, Angelo Antonini, Andrea Guerra, Alessandro Stefani

BackgroundRapid eye movement (REM) sleep behavior disorder (RBD) may precede motor symptoms in Parkinson's disease (PD) by years. According to a recent hypothesis, premotor RBD (pRBD) is a marker of the PD body‐first subtype, where synucleinopathy originates from the peripheral autonomic nervous system. Conversely, in the brain‐first subtype, pathology would arise in the brain. Functional connectivity (FC) could provide additional insight into the neurodegenerative process of these putative PD subtypes.ObjectivesWe aim to analyze the possible FC differences between early‐stage PD patients with (PDpRBD+) and without (PDpRBD−) pRBD using high‐density electroencephalography (EEG).MethodsWe enrolled 28 PDpRBD+, 35 PDpRBD−, and 35 healthy controls (HC). Data were recorded with a 64‐channel EEG system, and a source‐reconstruction method was used to identify brain‐region activity. FC was calculated using the weighted phase‐lag index in θ, α, β, and low‐γ bands. Statistical analysis was conducted using network‐based statistic.ResultsWe found a significant trend of decreased α‐FC across PDpRBD+, PDpRBD−, and HC, mainly in prefrontal and temporal areas. The altered α‐FC correlated with Montreal Cognitive Assessment scores in PDpRBD+ and, to a lesser extent, PDpRBD− and with gait/postural disturbances in PDpRBD+ patients only. PDpRBD+ and PDpRBD− had similarly increased FC than HC in a β band network, predominantly involving sensorimotor and limbic areas. The increased β network FC was related to bradykinesia severity in both PD subgroups.ConclusionsCompared to PDpRBD− (brain‐first subtype), PDpRBD+ group (body‐first subtype) demonstrates specific EEG‐FC dysfunctions in the α band, which may reflect early involvement of the cholinergic ascending system. © 2024 International Parkinson and Movement Disorder Society.

中文翻译:


帕金森病 Body-First 和 Brain-First 亚型的皮质功能连接变化



背景快速眼动 (REM) 睡眠行为障碍 (RBD) 可能比帕金森病 (PD) 的运动症状早数年。根据最近的一个假设,前运动 RBD (pRBD) 是 PD 身体优先亚型的标志物,其中突触核蛋白病起源于周围自主神经系统。相反,在大脑优先的亚型中,病理会在大脑中出现。功能连接 (FC) 可以为这些假定的 PD 亚型的神经退行性过程提供更多见解。目的我们旨在使用高密度脑电图 (EEG) 分析有 (PDpRBD+) 和无 (PDpRBD−) pRBD 的早期 PD 患者之间可能的 FC 差异。方法我们招募了 28 例 PDpRBD+、35 例 PDpRBD− 和 35 例健康对照 (HC)。使用 64 通道 EEG 系统记录数据,并使用源重建方法识别脑区活动。FC 是使用 θ、α、β 和低γ带的加权相位滞后指数计算的。使用基于网络的统计进行统计分析。结果我们发现 PDpRBD+、PDpRBD− 和 HC 的 α-FC 呈显着下降趋势,主要在前额叶和颞叶区域。改变的 α-FC 与 PDpRBD+ 的蒙特利尔认知评估评分相关,在较小程度上与 PDpRBD− 相关,仅与 PDpRBD+ 患者的步态/姿势障碍相关。在β带网络中,PDpRBD+ 和 PDpRBD− 的 FC 增加程度相似于HC,主要涉及感觉运动和边缘区域。β网络 FC 增加与两个 PD 亚组的运动迟缓严重程度有关。结论与 PDpRBD− (脑优先亚型) 相比,PDpRBD+ 组 (身体优先亚型) 在 α 波段表现出特定的 EEG-FC 功能障碍,这可能反映了胆碱能上行系统的早期参与。 © 2024 年国际帕金森和运动障碍协会。
更新日期:2024-11-29
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