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Alzheimer Disease ll: Pathophysiology01:23

Alzheimer Disease ll: Pathophysiology

Alzheimer disease involves structural changes in the brain that begin long before symptoms appear. The most distinctive features are extracellular neuritic plaques and intracellular neurofibrillary tangles.Neuritic plaques form in the cerebral cortex and around blood vessels. These plaques contain a dense core of beta-amyloid (Aβ)—a toxic protein fragment that clumps outside neurons. The core is surrounded by damaged neuronal extensions, as well as reactive astrocytes and microglia. Abnormal...

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Updated: Jun 23, 2026

3D Modeling of the Lateral Ventricles and Histological Characterization of Periventricular Tissue in Humans and Mouse
15:26

3D Modeling of the Lateral Ventricles and Histological Characterization of Periventricular Tissue in Humans and Mouse

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[死后大脑变化的特征]

A I Shchegolev1, U N Tumanova1, O V Savva1,2

  • 1National Medical Research Center for Obstetrics, Gynecology and Perinatology named after Academician V.I. Kulakov, Moscow, Russia.

Sudebno-meditsinskaia ekspertiza
|December 23, 2024
PubMed
概括

死亡后的大脑变化,如细胞自解,开始在20分钟内. 这些通过各种成像和显微镜技术可见的变化有助于确定死后的时间.

科学领域:

  • 法医病理学 法医病理学
  • 神经科学是一个神经科学.
  • 医疗成像医学成像

背景情况:

  • 了解死后大脑的变化对于法医调查至关重要.
  • 死亡后,大脑表现出独特的自溶过程.
  • 在不同大脑区域的死后变化的变化需要详细的分析.

研究的目的:

  • 审查和分析关于死后大脑变化的文献.
  • 评估这些变化对估计自死亡以来的时间的有用性.
  • 确定可视化死后大脑变化的最有效方法.

主要方法:

  • 关于死后大脑变化研究的文献综述.
  • 分析来自电子显微镜,组织学,组织化学和免疫组织化学的数据.
  • 评估成像技术,如死后CT和MRI. 评估成像技术.

主要成果:

  • 通过电子显微镜检测到脑细胞自解的最早迹象是在死后15-20分钟.
  • 使用组织学和组织化学方法观察到逐渐的形态功能变化,随着死亡后间隔的增加.
  • 尸检扫描被认为是可视化大脑低位的有效方法.
  • 大脑自解会影响CT密度和MRI对比度,减少解剖特征的可见性.
关键词:
自溶解是一种自溶的过程.脑子 脑子 脑子 大脑死亡后的变化自死亡以来的时间.

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Last Updated: Jun 23, 2026

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结论:

  • 死后的大脑变化为确定自死亡以来的时间提供了有价值的指标.
  • 显微镜和先进的成像技术的结合提供了全面的见解.
  • 进一步的研究可以根据大脑变化改进基于死亡时间估计的准确性.