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Related Concept Videos

Post-traumatic Stress Disorder01:27

Post-traumatic Stress Disorder

Post-traumatic stress disorder (PTSD) is a psychiatric condition that arises following exposure to traumatic events such as natural disasters, forced displacement, or severe accidents. It significantly impairs individuals' ability to cope with daily activities and disrupts their emotional and psychological equilibrium.
Symptoms and Behavioral Manifestations
A spectrum of distressing symptoms characterizes PTSD. Recurrent flashbacks, where individuals involuntarily relive traumatic events, are a...
Introduction to Stress and Lifestyle01:27

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...
Complement System01:27

Complement System

The complement system is a group of approximately 20 plasma proteins that strengthen the body's defenses against infections through opsonization, inflammation, and cell lysis. Opsonization involves coating pathogens with complement proteins, making them more recognizable and facilitating phagocyte engulfment. Certain complement proteins induce inflammation that attracts immune cells to the site of infection. Cell lysis involves the destruction of pathogens through the formation of a membrane...
Psychoneuroimmunology: Cardiovascular Disease01:27

Psychoneuroimmunology: Cardiovascular Disease

Psychoneuroimmunology (PNI) is a multidisciplinary field that examines how psychological factors, particularly stress, interact with the immune system and impact physical health. Research in PNI has shown that chronic or traumatic stress can disrupt both the hypothalamic-pituitary-adrenal axis and the sympathetic nervous system. These disruptions contribute to serious health conditions, including cardiovascular diseases.
A key area of focus in PNI is the relationship between stress and coronary...
Traumatic Memory01:20

Traumatic Memory

Emotionally traumatic events often lead to memories that are exceptionally vivid and enduring, sometimes persisting with remarkable clarity throughout an individual's life. A classic example of this phenomenon is a person who survives a car accident. Even years later, they may recall every detail of the event with startling accuracy — the screeching of the tires, the jarring impact, and the acrid smell of burning rubber. Such vividness contrasts sharply with how an individual remembers mundane...
Psychological Responses to Stress01:20

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...

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Related Experiment Video

Updated: Jun 14, 2026

Polar Histogram Visualization of Acute Stress Disorder Scale Scores for Comprehensive Clinical Assessment
08:25

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

Published on: December 6, 2024

Alterations in the complement cascade in post-traumatic stress disorder.

Lilit P Hovhannisyan1, Gohar M Mkrtchyan, Samvel H Sukiasian

  • 1Institute of Molecular Biology of the National Academy of Sciences of Armenia.

Allergy, Asthma, and Clinical Immunology : Official Journal of the Canadian Society of Allergy and Clinical Immunology
|March 20, 2010
PubMed
Summary
This summary is machine-generated.

This study reveals that post-traumatic stress disorder (PTSD) involves an imbalanced complement system, with specific pathway activations and deactivations. These findings highlight inflammation

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Last Updated: Jun 14, 2026

Polar Histogram Visualization of Acute Stress Disorder Scale Scores for Comprehensive Clinical Assessment
08:25

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Rapid Fractionation and Isolation of Whole Blood Components in Samples Obtained from a Community-based Setting
11:31

Rapid Fractionation and Isolation of Whole Blood Components in Samples Obtained from a Community-based Setting

Published on: November 30, 2015

Area of Science:

  • Immunology
  • Neuroscience
  • Psychiatry

Background:

  • The complement system is a crucial mediator of immune responses.
  • Its role in post-traumatic stress disorder (PTSD) remains incompletely understood.

Purpose of the Study:

  • To investigate the functional state of the complement system in individuals with PTSD.
  • To determine if complement pathway activity correlates with PTSD.

Main Methods:

  • Assessed hemolytic activities of classical and alternative complement pathways in PTSD patients and healthy controls.
  • Measured individual complement component activities.
  • Performed correlation analysis between measured parameters.

Main Results:

  • Post-traumatic stress disorder (PTSD) demonstrated hyperactivation of the classical complement pathway.
  • Hypoactivation of the alternative complement pathway was observed in PTSD.
  • Overactivation of the terminal complement pathway was a key finding.

Conclusions:

  • The study provides evidence for the involvement of inflammatory processes in the pathogenesis of PTSD.
  • Complement system dysregulation may contribute to PTSD development and progression.