静脉功能障碍和轻度认知障碍对老年人反应性步行反应的综合影响
Jessica Pitts1, Tej Mehta, Lakshmi Kannan
1Department of Physical Therapy, University of Illinois at Chicago, Chicago, IL.
Medicine and science in sports and exercise
|January 28, 2026
概括
静脉管功能障碍 (VD) 在轻度认知障碍 (OAwMCI) 的老年人中显著影响反应平衡,增加了跌倒风险. 这种功能障碍影响了反应性步骤的触发和执行,在OAwMCI中比在认知上完整的老年人更重要.
科学领域:
- 老年学是一门学科.
- 神经科学是一个神经科学.
- 生物力学 生物力学
背景情况:
- 静脉管功能障碍 (VD) 与老年人跌倒风险增加有关.
- 与认知完整的老年人 (CIOA) 相比,轻度认知障碍 (OAwMCI) 的老年人表现出更高的静脉疾病和反应平衡缺陷率.
- 在OAwMCI中VD对反应平衡损失的具体贡献尚不清楚.
研究的目的:
- 研究VD对反应性步进动力学和神经肌肉控制的影响.
- 为了比较OAwMCI和CIOA群体中的这些效应.
- 确定VD是否加剧了OAwMCI.的现有余额赤字.
主要方法:
- 在OAwMCI (n=28) 和CIOA (n=35) 中评估了对前支表面扰动的反应性步骤反应.
- 通过临床测试确定VD (头部推力,VOR减速,VOR取消).
- 测量下降率,质量中心 (COM) 稳定性,步骤启动/执行以及肌肉激活延迟和幅度.
主要成果:
- 与没有VD的OAwMCI相比,VD的OAwMCI表现出较高的跌倒率,较差的COM稳定性,延迟的步骤启动和较长的肌肉发作的延迟时间.
- 患有VD的OAwMCI和CIOA都表现出延长的步骤执行和步骤过程中改变的肌肉激活模式.
- 对于步骤启动缺陷,观察到认知状态和VD之间的显著相互作用.
结论:
- VD加剧了OAwMCI中的反应平衡赤字,主要是通过损害反应步骤触发和启动.
- 反应式步骤执行在OAwMCI和CIOA中都受到VD的影响.
- 在OAwMCI中,受损的感觉重权可能会限制对不可靠的前庭输入的补偿.
- 建议对认知状态和VD进行综合查,以全面评估跌倒风险.
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