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相关概念视频

Capillary Beds01:20

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Capillary beds are networks of tiny blood vessels that play a crucial role in the circulatory system. These beds are where the exchange of gases, nutrients, and waste products occurs between the blood and surrounding tissues. Each capillary bed consists of numerous capillaries, which are the smallest blood vessels in the body, typically only one cell-thick. This thinness allows for the efficient diffusion of substances.
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Veins as Blood Reservoirs01:10

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Veins, while chiefly responsible for circulating blood back to the heart, also function as storage vessels for blood. They house approximately 64 percent of the body's total blood volume, a feat made possible by their high capacitance—the inherent ability to expand and accommodate large volumes of blood, even under low pressure. The large diameter and thin walls of veins augment their distensibility, significantly more so than arteries, due to their classification as capacitance...
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Venules01:08

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Venules are an integral part of the microscopic circulatory system that bridges the gap between capillaries and veins.
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Bones have various surface features that help form joints and attach to other soft tissues. Depending on the function, bone markings are categorized into articulating projections, processes for attachment, depressions, and openings.
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Capillaries and Their Types01:20

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Capillaries, a crucial constituent of the circulatory system, are diminutive vessels with a diameter between 5–10 micrometers, accommodating perfusion to the tissues through the phenomenon known as microcirculation. Through their permeable walls, consisting of an endothelial layer ensconced by a basement membrane and sporadically dispersed smooth muscle fibers, the exchange of substances between the blood and the interstitial fluid becomes plausible. Variance in wall composition exists,...
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Veins are an integral part of our circulatory system, serving as the blood vessels that transport blood from all body regions to the heart. They are a network of hollow tubes that carry blood low in oxygen from the body's cells back to the heart for reoxygenation. Veins are crucial for maintaining the body's overall fluid balance and the continuous circulation of blood.
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为什么周血管空间很重要?

Tatyana Shulyatnikova1, Melvin R Hayden2

  • 1Department of Pathological Anatomy and Forensic Medicine, Zaporizhzhia State Medical University, Mayakovsky Avenue, 26, 69035 Zaporizhzhia, Ukraine.

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概括

通过MRI可见的扩大周血管空间 (EPVS) 与衰老,高血压和神经退行性疾病 (如阿尔茨海默氏症) 有关. 这些空间对于通过淋巴系统清理大脑废物至关重要.

关键词:
卡迪西尔卡迪西尔大脑MRI脑部MRI脑部毛细管稀疏化 毛细管稀疏化大脑小血管疾病是大脑小血管疾病.扩大的周围血管空间.淋巴系统 淋巴系统认知障碍 认知障碍是一种认知障碍.这里有缺口,有缺口.神经退行症的神经退行症白质的超强度是白质的超强度.

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科学领域:

  • 神经成像是一种神经成像.
  • 脑血管健康 脑血管健康
  • 神经退行性疾病 神经退行性疾病

背景情况:

  • 周血管空间 (PVS) 和其扩大形式 (EPVS) 在神经成像中越来越多地被识别出来.
  • EPVS与衰老,高血压和脑小血管疾病 (SVD) 有关.
  • 这些空间对淋巴管道至关重要,负责清除大脑中的代谢废物.

研究的目的:

  • 突出人们对EPVS作为生物标志物的兴趣日益增长.
  • 讨论EPVS在淋巴系统的废物清理功能中的作用.
  • 探索EPVS与神经退行性疾病和衰老的关联.

主要方法:

  • 使用T2权重磁共振成像 (MRI) 进行EPVS的非侵入性可视化.
  • 观察EPVS分布在常见的大脑区域 (基底,半圆中心,额叶皮层,海马).

主要成果:

  • 在老化和高血压患者中经常观察到EPVS,作为SVD的生物标志物.
  • EPVS涉及神经毒性蛋白质的清除,如粉样β和tau,与晚发性阿尔茨海默病 (LOAD) 有关.
  • 增加的EPVS也与帕金森病和多发性硬化症 (MS) 有关.

结论:

  • 通过MRI进行EPVS可视化提供了一种评估大脑健康的非侵入性方法.
  • 在EPVS中的功能障碍可能会导致有毒蛋白质的积累,可能导致神经退行.
  • EPVS 作为各种神经疾病和衰老过程的关键指标.