大脑结构与步态和认知能力双重下降之间的关联
Sadhani Karunarathna1, Monique Breslin1, Jane Alty2
1Menzies Institute for Medical Research, University of Tasmania, Hobart, Tasmania, Australia.
Neurobiology of aging
|August 29, 2024
概括
步态和认知能力的双重下降增加了痴呆症的风险. 脑结构,包括灰色/白质和白质过强度,与这种双重衰退有关,特别是记忆和处理速度.
科学领域:
- 神经科学是一个神经科学.
- 老年学是指老年学的学科.
- 神经学 神经学
背景情况:
- 步态和认知能力的双重下降是痴呆症的重要危险因素.
- 步行和记忆力下降的结合显示了与痴呆风险的最强相关性.
- 了解双重衰退的神经生物学基础对于早期干预至关重要.
研究的目的:
- 调查基线大脑结构和经历双重下降步态和认知功能的个体之间的关联.
- 通过记忆,处理速度-注意力和口语流性领域识别双重下降者的特定大脑结构相关物.
主要方法:
- 在267名参与者中利用了三次连续步行速度和认知评估.
- 根据步行速度和认知指标的年度下降来对参与者进行分类.
- 分析了基线大脑结构 (灰质,白质,白质超强度,海马体积) 和双衰减组之间的关联.
主要成果:
- 较低的灰质和白质体积和较高的白质超强度体积与双重下降的风险增加有关,无论是步态还是记忆和处理速度-注意力 (p <0.05).
- 较低的海马体积与步态和记忆的双重下降密切相关 (p = 0.047).
- 对于步态和口语流的双重下降,没有发现显著的大脑结构相关性.
结论:
- 神经退行性病理和白质强度过高与步态与记忆和处理速度-注意力双重下降有关.
- 降低海马体积可能特别有助于步态和记忆力的综合下降.
- 这些发现突出了不同的神经生物学途径,为不同的双重衰退模式做出了贡献.
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