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Related Concept Videos

Allergic Reactions02:06

Allergic Reactions

Overview
Physiological Foundation of Stress01:24

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.
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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 Health01:30

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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Restraint to Induce Stress in Mice and Rats
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Acute Stress Promotes Aggressive-Like Behavior in Rats Made Allergic to Tree Pollen.

Leonardo H Tonelli1, Akina Hoshino, Morgan Katz

  • 1Laboratory of Behavioral Neuroimmunology, Mood and Anxiety Program, Department of Psychiatry, University of Maryland School of Medicine, Baltimore, Maryland, USA.

International Journal of Child Health and Human Development : IJCHD
|July 13, 2010
PubMed
Summary
This summary is machine-generated.

Allergies and acute stress significantly increase aggressive behaviors in female rats. This suggests allergies may be a risk factor for suicidal behavior by altering emotional reactivity.

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Area of Science:

  • Neuroscience
  • Immunology
  • Behavioral Science

Background:

  • Allergies are linked to depression and suicide risk in women.
  • Aggression is a key factor in suicidal behavior.
  • Stress influences both allergies and suicidal behavior.

Purpose of the Study:

  • To investigate the relationship between allergies and aggression.
  • To determine if allergies contribute to suicidal behavior risk factors.
  • To examine the role of acute stress in this relationship.

Main Methods:

  • Female Brown Norway rats, susceptible to allergies, were used.
  • Rats were sensitized and challenged with tree pollen to induce allergies.
  • Aggressive behaviors were assessed using the resident-intruder test before and after acute stress (forced swimming).

Main Results:

  • Allergic rats exposed to acute stress showed significantly increased aggressive-like behavior.
  • This increase was compared to control groups and pre-stress scores.
  • Combined allergies and stress amplified aggressive behaviors.

Conclusions:

  • Allergies and acute stress can heighten aggressive-like behavior.
  • These factors may contribute to altered emotional reactivity.
  • This heightened reactivity could influence suicidal behavior risk.