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相关概念视频

Physiological Foundation of Stress01:24

Physiological Foundation of Stress

776
Stress triggers a coordinated physiological response involving the sympathetic nervous system (SNS) and the hypothalamic-pituitary-adrenal (HPA) axis. This dual activation ensures that the body is prepared for both immediate and prolonged stress management. The process begins with the perception of a stressor. This initial phase activates the SNS, leading to the rapid release of adrenaline (epinephrine) from the adrenal glands.
Role of the Sympathetic Nervous System
Adrenaline triggers the...
776
Psychological Responses to Stress01:20

Psychological Responses to Stress

763
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...
763
Stress Response System01:21

Stress Response System

961
The stress response system, also known as the fight-or-flight response, is the body's automatic physiological reaction to perceived threats. Hans Selye introduced the concept of General Adaptation Syndrome (GAS) to describe the predictable pattern of changes that occur in response to stress. GAS consists of three sequential stages: alarm, resistance, and exhaustion. This model helps explain how chronic stress can contribute to health problems.
Alarm stage
In the alarm stage, the body's...
961
Exercise Stress Test01:26

Exercise Stress Test

1.5K
Introduction
Exercise stress testing, commonly known as a treadmill test, is a noninvasive procedure used to evaluate cardiovascular function and diagnose heart conditions.
Definition
An exercise stress test measures the heart's response to exertion using a treadmill or stationary bicycle. Chest electrodes record the heart's electrical activity through an ECG, and blood pressure is monitored regularly.
Purposes
1.5K
Components of Stress01:23

Components of Stress

586
Stress analysis under multiple loading conditions is intricate, necessitating a comprehensive grasp of normal and shearing stresses. Consider a small cube at point O, subjected to stress on all six faces, visible or not. Normal stress components σx, σy, σz act perpendicularly to the x, y, and z axes. Shearing stress components τxy and τxz are exerted on faces perpendicular to these axes.
Interestingly, the hidden cube faces also experience these stresses, equal and...
586
General State of Stress01:21

General State of Stress

703
The general state of stress within a material can be accurately depicted using a stress tensor. This tensor encapsulates the internal forces distributed within a material subjected to external forces or deformations.
Specifically, consider a tetrahedral element where one face, labeled XYZ, is perpendicular to the line OA, and the remaining faces align with the coordinate axes with point O as the origin. At any point, such as point O, the stress tensor can be used to determine the stress...
703

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相关实验视频

Updated: Feb 24, 2026

The Trier Social Stress Test Protocol for Inducing Psychological Stress
09:39

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Published on: October 19, 2011

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行动中的心脏整体感应:在压力诱导后通过语音任务进行调制.

Lorena Desdentado1, Micah G Allen2, Jasmin Schultze3

  • 1Department of Clinical and Health Psychology, Institute of Psychology and Education, Ulm University, Albert-Einstein-Allee 47, 89069 Ulm, Germany; CIBER of Physiopathology of Obesity and Nutrition (CIBEROBN), Instituto de Salud Carlos III, Av. Monforte de Lemos, 3-5, 28029 Madrid, Spain; Polibienestar Research Institute, University of Valencia, Serpis 29, 46022 Valencia, Spain; Department of Developmental and Educational Psychology, University of Valencia, Blasco Ibáñez 21, 46021 Valencia, Spain; Department of Personality, Evaluation and Psychological Treatments, University of Valencia, Av. Blasco Ibáñez 21, 46010 Valencia, Spain.

Biological psychology
|February 22, 2026
PubMed
概括

急性压力增强心脏内接收,改善感知心脏信号的能力. 这项研究发现,在压力较大的任务中,心脏的感觉敏感度和注意力增加.

关键词:
焦虑是一种焦虑.整体感受 整体感受 整体感受预测编码的预测编码.公共演讲 公共演讲演讲任务 演讲任务压力就是压力,压力就是压力.

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Evaluation of Commercial-Off-The-Shelf Wrist Wearables to Estimate Stress on Students
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Modulation of the Neurophysiological Response to Fearful and Stressful Stimuli Through Repetitive Religious Chanting
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相关实验视频

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科学领域:

  • 心理学 心理学 心理学
  • 神经科学是一个神经科学.
  • 心理生理学 心理生理学

背景情况:

  • 交感,身体内部状态的感觉,通常在休息状态下被研究.
  • 新出现的证据表明,整个感知过程可能会随着外部需求而改变.
  • 特别是心脏内观感,即对心跳的感知,是一个关键的兴趣领域.

研究的目的:

  • 为了调查心脏整体感受是否因急性压力而改变.
  • 为了检查在压力下整感觉敏感性和相关措施的变化.

主要方法:

  • 139名成年人接受了压力较大的语言任务或控制阅读任务.
  • 用心率歧视 (HRD) 任务来评估心脏整体受体.
  • 在任务前和之后收集了对心脏信号的注意力自我报告措施.

主要成果:

  • 与对照组相比,压力组表现出显著增加的整感受敏感度 (d).
  • 处于压力的参与者报告说,他们对心脏信号的注意力增加了.
  • 在其他整体受体结局中没有发现显著的变化.

结论:

  • 剧烈的压力似乎会增强心脏的感知灵敏度和对心脏的自我关注.
  • 这些发现表明,压力和整体感知之间存在动态的相互作用.
  • 需要进一步的研究来验证这些结果并探索临床影响.