灰质损失与Lewy体疾病和衰老中的双重任务步态有关
Arsenije Subotic1, Myrlene Gee1, Krista Nelles1
1Department of Medicine, Division of Neurology, University of Alberta, 7-112J CSB, 11350-83 Ave NW, Edmonton, AB, T6G 2G3, Canada.
Journal of neurology
|October 30, 2023
概括
灰质损失,包括较小的杏仁体和皮质体积,与Lewy体障碍 (LBD) 和对照群的双重任务 (DT) 步行表现较差有关. 这表明与年龄相关的神经退行影响了DT步态.
科学领域:
- 神经科学是一个神经科学.
- 神经学 神经学
- 老年学是一门学科.
背景情况:
- 勒维体疾病 (LBD),包括帕金森病 (PD) 和勒维体痴呆症 (DLB),表现出双重任务 (DT) 条件加剧的步态和平衡问题.
- 驱动LBD中DT步态变化的特定大脑机制尚不清楚.
研究的目的:
- 探索灰质体积减少与LBD患者的DT步态表现变化之间的关联.
- 为了确定大脑结构差异是否与双重任务步行成本 (DTC) 在LBD频谱和对照中相关.
主要方法:
- 评估了79名患有PD,轻度认知障碍PD,PD痴呆症 (PDD) 或DLB的参与者,以及20名对照人群.
- 双任务成本 (DTC) 量化了单个和DT条件之间的步行速度变化.
- 使用FreeSurfer测量皮层,皮下,心室和小脑体积;用线性回归分析大脑体积和DTC关系.
主要成果:
- 桃体和皮质总体体积的减少,以及心室体积的扩大,在LBD和对照组中都与较高的DTC相关.
- 在参与者群体和大脑体积之间没有观察到显著的相互作用效应.
- 包括诸如认知/运动状态或白质超强度体积等共变量,并没有改变大脑体积-DTC关联.
结论:
- 灰质体积损失始终与整个LBD频谱和健康对照中的DT步行表现下降有关.
- 与年龄相关的皮质神经退行可能是导致这些人群中DT步行性能受损的关键因素.
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