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相关概念视频

Fatigue01:21

Fatigue

170
Fatigue occurs when materials rupture under repeated or fluctuating loads, even at stress levels far below their static breaking strength. It typically results in brittle failure, even for ductile materials. It is a critical consideration in designing machines and structural components subjected to repetitive or varying loads. The nature of these loadings can range from fluctuating loads like unbalanced pump impellers causing vibrations to repeatedly bending a thin steel rod wire back and forth...
170
Fatigue Strength of Concrete01:22

Fatigue Strength of Concrete

156
Fatigue, in the context of materials science and engineering, refers to the weakening or failure of a material caused by repeatedly applied loads, even if these loads are below the strength limit of the material. Fatigue strength in concrete is a critical property that influences its durability and longevity. Concrete can fail in two ways due to fatigue. Static fatigue or creep rupture occurs under a constant load or one that increases slowly. The other failure mode is due to cyclical or...
156
Stress and Mental Health01:30

Stress and Mental Health

70
Chronic stress profoundly affects mental health, significantly influencing mood, behavior, and overall quality of life. Research closely links chronic stress with mental health conditions such as depression, anxiety, and substance use disorders. Ongoing exposure to stress can lead to physiological and psychological changes, initiating a cycle of emotional distress and maladaptive coping mechanisms.
Individuals with depression often experience challenges in both their personal and professional...
70
Muscle Recovery and Fatigue01:24

Muscle Recovery and Fatigue

1.9K
Muscle fatigue refers to the decline in a muscle's ability to maintain the force of contraction after prolonged activity. It primarily stems from changes within muscle fibers. Even before experiencing muscle fatigue, one may feel tired and have the urge to stop the activity. This response, known as central fatigue, occurs due to changes in the central nervous system, namely the brain and spinal cord. While there is no single mechanism that induces fatigue, it may serve as a protective...
1.9K
Psychological Responses to Stress01:20

Psychological Responses to Stress

34
Psychological responses to stress encompass the various cognitive and emotional reactions individuals experience when faced with challenging or threatening situations, such as a job loss. Prolonged exposure to stressors can disturb emotional balance, increasing negative emotions (e.g., anxiety and sadness) and diminishing positive emotions (e.g., joy and satisfaction). These persistent emotional shifts are associated with an increased risk of both physical illness and mental health issues, such...
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相关实验视频

Updated: May 23, 2025

Measuring the Motor Aspect of Cancer-Related Fatigue using a Handheld Dynamometer
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性能有效性之间的关系 测试失败,疲劳和长期COVID中的心理功能

Greta N Minor1, Olivia R Kessler1, Laura Fry1

  • 1Department of Rehabilitation Medicine, University of Minnesota, Minneapolis, MN, USA.

The Clinical neuropsychologist
|March 8, 2025
PubMed
概括

长时间的COVID患者.

关键词:
在 COVID-19 疫情中,性能有效性测试是指性能有效性测试.外部激励的外部激励不值得信赖的业绩表现心理评估 心理评估

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Last Updated: May 23, 2025

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科学领域:

  • 神经科学是一个神经科学.
  • 心理学 心理学 心理学
  • 临床医学 临床医学

背景情况:

  • 长期的COVID可能会影响认知功能,并呈现体质症状.
  • 性能有效性测试 (PVTs) 评估认知努力的真诚性.
  • 症状有效性测试 (SVT) 被整合到人格评估中.

研究的目的:

  • 在长期COVID患者中调查自我报告的症状和表现有效性之间的关系.
  • 检查疲劳 (修改疲劳影响量表) 和人格库存 (人格评估库存) 的反应是否与PVT失败相关.

主要方法:

  • 175名长期COVID患者完成了四项PVT,修改疲劳影响量表 (MFIS) 和人格评估清单 (PAI).
  • 患者被分为通过 (没有PVT失败),中间 (1 PVT失败) 和失败 (2+ PVT失败) 组.
  • 对25.71%的参与者进行了医疗记录审查,以验证症状报告.

主要成果:

  • 84.57%的参与者通过了所有PVT,9.14%属于中间组,6.29%不通过2+PVT.
  • 组之间没有观察到外部激励频率的显著差异.
  • 与通过组相比,失败组在PAI上报告了略有增加的体化症状 (SOM-S);MFIS得分没有显著差异.

结论:

  • 长期COVID患者的表现有效性失败与疲劳没有很强的关联.
  • 除了体化症状外,PAI反应似乎与PVT表现没有显著联系.
  • 需要进一步的研究,以了解长期COVID人群中有效性测试的细微差别.