白质高强度负荷调解了年龄和认知之间的关系
Natalie Busby1, Sarah Wilson1, Janina Wilmskoetter2
1Department of Communication Sciences and Disorders, University of South Carolina, Columbia, SC, USA.
Neurobiology of aging
|September 20, 2023
概括
老年与认知能力下降有关,白质超强度 (WMHs) 起到关键的调解作用. 不管年龄如何,增加WMH负载与较差的认知分数有关,这突显了它们对大脑健康的影响.
科学领域:
- 神经成像是一种神经成像.
- 认知神经科学 认知神经科学
- 老年学是指老年学的学科.
背景情况:
- 白质超强度 (WMHs) 在衰老中很常见,并影响大脑结构和功能.
- 了解衰老,WMH和认知衰退之间的联系对于识别有风险的个体至关重要.
- 以前的研究表明,WMHs可能在与年龄相关的认知变化中发挥作用.
研究的目的:
- 调查白质强度过高 (WMH) 负载是否调解了年龄和认知衰退之间的关系.
- 为了确定年龄是否缓和了WMH严重程度和认知表现之间的关联.
- 探索不同年龄段的胆固醇水平和WMH严重程度之间的关系.
主要方法:
- 一组166名年龄在20-80岁的健康参与者完成了蒙特利尔认知评估 (MoCA).
- 白质超强度 (WMHs) 在FLAIRMRI扫描上被手动细分.
- 进行中介分析,通过WMH负载来评估年龄对认知的间接影响.
主要成果:
- 年龄较大与认知功能较差有显著的关联 (p < 0.001).
- 这种关联是由WMH负荷介导的:老年人有更多的WMH,这反过来又与较低的MoCA分数有关.
- 无论年龄如何,WMH严重程度与认知能力下降相关,高胆固醇与WMH严重程度的增加有关.
结论:
- 白质超强度负荷显著调解了年龄和认知衰退之间的关系.
- 严重的WMH会影响成年人一生的认知功能,不论年龄如何.
- 高胆固醇是增加白质过强度的潜在危险因素,这表明与大脑衰老有关.
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