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Related Concept Videos

Psychological Responses to Stress01:20

Psychological Responses to Stress

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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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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.
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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.
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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.
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Stress is a multifaceted response to events perceived as challenging or threatening, highlighting physical, emotional, cognitive, and behavioral reactions. Physically, stress can lead to fatigue, sleep disruptions, and various health issues such as frequent colds, chest pains, and nausea. Emotionally, it can manifest as anxiety, depression, irritability, and anger triggered by both minor and major life events. Cognitively, it may result in difficulty in concentration, memory, and...
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Restraint to Induce Stress in Mice and Rats
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Untangling the multifaceted VTA responses to stress.

Urszula Skupio1, Alexander Z Harris1, Abigail M Polter2

  • 1Department of Psychiatry, Columbia University, College of Physicians and Surgeons, New York, NY, USA; Area Neuroscience, New York State Psychiatric Institute, New York, NY, USA.

Trends in Neurosciences
|July 17, 2025
PubMed
Summary

Stress significantly impacts the ventral tegmental area (VTA), influencing behavior. This review explores VTA stress responses, proposing neuronal diversity and stress complexity drive adaptive behavioral changes.

Keywords:
acute stresschronic stressdopamineplasticityreward circuitry

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Area of Science:

  • Neuroscience
  • Behavioral Science

Background:

  • Stress profoundly affects the ventral tegmental area (VTA).
  • Understanding VTA adaptation to stress is crucial for explaining stress-driven behaviors.
  • Previous research has not fully elucidated the complex and opposing effects of stress on the VTA.

Purpose of the Study:

  • To review VTA responses to acute and chronic stress.
  • To propose mechanisms underlying divergent VTA stress responses.
  • To highlight the VTA's role in integrating information for behavioral adaptation.

Main Methods:

  • Literature review focusing on studies in mice and rats.
  • Analysis of VTA neuronal heterogeneity.
  • Examination of stressor multidimensionality and cumulative effects.

Main Results:

  • VTA exhibits varied plasticity in response to acute and chronic stress.
  • Divergent stress responses are linked to VTA neuronal heterogeneity.
  • Stress effects are influenced by the nature of the stressor and prior exposures.

Conclusions:

  • The VTA integrates homeostatic and affective information during stress.
  • VTA plasticity supports flexible behavioral adjustments post-stress.
  • VTA's role in stress adaptation is key to nuanced behavioral responses.