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相关概念视频

Infection01:20

Infection

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When a pathogen enters the body and reproduces, it can cause an infection, damage body cells, and cause illness symptoms that eventually lead to disease. Therefore, its prevention requires breaking the chain of infection.
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Urinary Tract Infection II: Pathophysiology

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The pathophysiology of urinary tract infections (UTIs) encompasses several progressive stages, beginning with bacterial colonization and culminating in potential systemic complications if untreated. UTIs are primarily initiated by bacteria, such as Escherichia coli, which often originate from the gastrointestinal tract and migrate to the urinary system through the periurethral area. This migration can occur via several routes, including improper hygiene practices, sexual activity, or...
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Cystic fibrosis (CF), an autosomal recessive disorder, significantly affects the function of exocrine glands. This genetically inherited disease is characterized by the production of thick and sticky mucus, which can severely affect various organs and systems in the body.
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Stages of infection describe what happens to a susceptible host once a pathogen invades the human body. The stages of infection are incubation, prodromal, illness, stage of decline, and convalescence. The incubation stage is the period from exposure to a pathogen until symptoms start. The infected person is unaware of impending illness as the pathogens grow and multiply within the body. The duration may vary depending on the type of infection. The incubation period of measles averages ten to...
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The human immune system is a complex network of cells, tissues, and organs that work together to defend the body against bacterial infections. It consists of various immune cells, each playing a specific role in the defense mechanism.
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基础科学和病原发生学

Lauren Oberlin1,2, Audrey M Collins3, Eric D Vidoni4

  • 1AdventHealth Neuroscience Institute, Orlando, FL, USA.

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PubMed
概括
此摘要是机器生成的。

定期体育活动 (PA) 和更高的心肺呼吸能力 (CRF) 与老年人更好的认知功能和大脑健康有关. 保持健康可能有助于抵消神经退行变化,特别是在患有临床前阿尔茨海默氏症 (AD) 病理的人群中.

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科学领域:

  • 神经科学是一个神经科学.
  • 老年学是一门学科.
  • 预防医学 预防医学

背景情况:

  • 身体活动 (PA) 是保持认知功能和降低痴呆风险的潜在策略.
  • 关于PA对认知的有效性,剂量和影响机制的关键问题仍然存在.
  • 了解这些因素对于开发精确的预防方法和行为干预措施至关重要.

研究的目的:

  • 研究有氧运动对老年人认知和大脑健康的临床影响和生物途径.
  • 介绍一项第三期临床试验 (IGNITE研究) 的初步截面和纵向发现.
  • 检查剂量反应关系和影响运动效果的因素.

主要方法:

  • IGNITE研究是一项为期12个月的随机试验,涉及648名老年人.
  • 参与者被分配为每周150分钟的中度有氧运动,每周225分钟的中度有氧运动,或每周150分钟的光强度拉伸/调整 (控制).
  • 收集的数据包括认知评估,脑MRI,PET粉样蛋白扫描,AD相关的血液生物标志物,加速度计和心肺呼吸能力 (CRF) 在基线和12个月.

主要成果:

  • 较高的基线健身 (CRF) 与较大的海马体积,保持白质完整性和更好的认知表现 (执行功能,处理速度,记忆) 相相关.
  • 较大的基线中度至强烈的PA (MVPA) 与更好的多领域认知表现和更慢的大脑衰老有关.
  • 更高的健身和MVPA与较低的NfL水平有关,特别是在Aβ阳性个体中,这表明它对神经退行产生保护作用.

结论:

  • 初步发现强调了在认知不受损的老年人中健身,PA,认知,大脑形态和AD生物标志物之间的关联.
  • 该研究确定了影响这些关系的多个调节者.
  • 这些发现可以为个性化的运动处方提供信息,以优化老年人的认知和大脑健康.