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Introduction to Stress and Lifestyle

Introduction to Stress and Lifestyle

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...

Psychological Responses to Stress

Psychological Responses to Stress

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...

Physiological Foundation of Stress

Physiological Foundation of Stress

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...

Types of Stressors

Types of Stressors

A stressor is any event, condition, or stimulus that triggers stress and causes a physical or psychological response in the body. Stressors can be categorized into three main types: catastrophes; significant life changes; and daily hassles, including social stress. Each can be detrimental to physical and mental well-being.
Catastrophes
Catastrophes refer to large-scale, unpredictable events that create overwhelming stress and a sense of threat. Examples include natural disasters like...

Hypothalamic-Pituitary Axis

Hypothalamic-Pituitary Axis

The response to stress—be it physical or psychological, acute or chronic—involves activation of the Hypothalamic-Pituitary-Adrenal (HPA) axis. The HPA axis is part of the neuroendocrine system because it involves both neuronal and hormonal communication. Its function is to regulate homeostatic systems—metabolic, cardiovascular, and immune—providing the necessary means to respond to a stressor.

Stress and Mental Health

Stress and Mental Health

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...

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Related Experiment Video

Updated: Feb 24, 2026

Polar Histogram Visualization of Acute Stress Disorder Scale Scores for Comprehensive Clinical Assessment

Polar Histogram Visualization of Acute Stress Disorder Scale Scores for Comprehensive Clinical Assessment

Published on: December 6, 2024

Acute stress disorder.

Richard A Bryant¹

¹School of Psychology, University of New South Wales, Sydney, NSW 2052, Australia.

Current Opinion in Psychology

|August 17, 2017

Summary

This summary is machine-generated.

Acute stress disorder (ASD) describes initial trauma reactions but does not predict PTSD. Trauma-focused therapy is the recommended treatment for ASD, outperforming medication.

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Published on: October 19, 2011

Area of Science:

Psychiatry
Trauma Psychology
Clinical Psychology

Background:

Acute stress disorder (ASD) was initially defined in DSM-IV as a predictor of posttraumatic stress disorder (PTSD).
Subsequent longitudinal research indicated that most individuals developing PTSD did not meet initial ASD criteria.
This led to a revised definition in DSM-5, focusing ASD on acute stress reactions without predictive value.

Purpose of the Study:

To review the evolution of the ASD diagnosis from DSM-IV to DSM-5.
To summarize current evidence regarding the treatment of ASD.
To discuss recent findings on the long-term trajectories of posttraumatic stress.

Main Methods:

Literature review of diagnostic criteria changes (DSM-IV to DSM-5).
Synthesis of findings from controlled treatment trials for ASD.
Analysis of recent longitudinal studies on posttraumatic stress adaptation.

Main Results:

The DSM-5 reclassified ASD, removing its predictive function for PTSD.
Trauma-focused cognitive behavior therapy (TF-CBT) is identified as the primary treatment for ASD, demonstrating superiority over pharmacological approaches.
Posttraumatic stress trajectories are diverse and influenced by post-trauma events, challenging earlier linear models.

Conclusions:

The conceptualization and diagnostic criteria for ASD have evolved significantly.
TF-CBT is the evidence-based treatment of choice for acute stress disorder.
Understanding diverse posttraumatic adaptation pathways is crucial for managing trauma-related conditions.