帕金森病的临床严重程度是由皮质补偿的下降决定的
Martin E Johansson1, Ivan Toni2, Roy P C Kessels3,4,5
1Donders Institute for Brain, Cognition and Behaviour, Radboud University Medical Center, Centre of Expertise for Parkinson & Movement Disorders, 6525 EN Nijmegen, The Netherlands.
Brain : a journal of neurology
|September 27, 2023
概括
帕金森病的症状严重程度与围前运动皮质中的补偿性大脑活动有关,而不仅仅是基底腺节功能障碍. 增强这种皮质补偿可能会改善未来帕金森病的治疗方法.
科学领域:
- 神经科学是一个神经科学.
- 神经学 神经学
- 医疗成像医学成像
背景情况:
- 基底质中的多巴胺功能障碍传统上与帕金森病 (PD) 运动症状 (如布拉迪基尼西亚) 有关.
- 然而,基底腺的多巴胺损失并不能完全解释PD进展和运动表型的个体差异.
- 补偿机制,可能涉及皮层区域,可能会影响症状严重程度.
研究的目的:
- 调查补偿性皮质机制,特别是围前运动皮质,是否解释PD临床严重程度的个体间差异.
- 在PD患者和对照者之间,以及在不同PD临床亚型之间,在视觉运动任务期间比较大脑活动.
主要方法:
- 功能性MRI (fMRI) 用于测量353名PD患者和60名对照患者的脑活动,这些患者在视觉运动任务期间需要不同的动作选择要求.
- 患有PD的患者被分为三个亚型 (扩散性恶性,中级,轻度运动占主导地位),并分析了布拉迪基尼西亚/认知评分.
- 与运动和动作选择相关的大脑活动的评估与临床亚型和严重程度措施相关.
主要成果:
- 与对照人群相比,PD患者表现出运动减慢和基底腺活动减少.
- 基底腺活动在PD亚型之间没有差异,也与临床评分无关,这表明其在症状变异性中的作用有限.
- 在轻度运动占主导地位的PD患者中观察到增强的前运动皮层活动,与较低的布拉迪基尼西亚和更好的认知相关,表明补偿作用.
结论:
- 帕金森病症状严重程度的个体间变化主要是由前运动皮质补偿形成的,而不仅仅是基底腺功能障碍.
- 准和增强这些补偿性皮质机制可能是PD的有希望的治疗策略.
- 未来的研究应该探索专注于增强帕金森病中前运动补偿功能的干预措施.
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