Cited by 53Stress Responses and CortisolHeart Rate Variability and Autonomic ControlMemory and Neural Mechanisms

Predictability of chronic intermittent stress: effects on sympathetic-adrenal medullary responses of laboratory rats

Konarska, Maria, Stewart, Robert E., McCarty, Richard·1990·Behavioral and Neural Biology

Abstract

This experiment involved an examination of sympathetic-adrenal medullary responses of laboratory rats following exposure to chronic intermittent stress. Animals were assigned at random to one of three groups: (i) controls, handled briefly each day; (ii) restraint stress (RS), restrained for 30 min per day; or (iii) variable stress (VS), exposure to restraint, cold swim, or intermittent footshock during one of five time periods each day. On the 26th day, rats were prepared with chronic tail artery catheters for remote sampling of blood and direct measurement of mean arterial pressure and heart rate. On Day 28, rats of each group were exposed to 30 min of restraint stress and timed blood samples were collected and later analyzed for content of norepinephrine (NE) and epinephrine (EPI). VS rats gained significantly less body weight compared to control and RS rats. Basal measures of blood pressure and heart rate and of plasma NE and EPI were comparable for rats of the three groups. The plasma catecholamine responses to restraint stress on Day 28 were significantly reduced in RS and VS rats compared to first-time stressed controls. These findings suggest that predictability of the type of stressor and the time of its occurrence does not influence the pattern of diminished sympathetic-adrenal medullary responses of animals exposed to chronic intermittent stress.

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Crossref · 10.1016/0163-1047(90)90458-i

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  • Antecedent recurrent episodes of stress, associated with high levels of epinephrine, lead to downregulation of sympathoadrenal responses to a subsequent stressor in animal studies.

    “animal studies have shown that antecedent recurrent episodes of stress, associated with high levels of epinephrine, lead to downregulation of sympathoadrenal responses to a subsequent stressor (38).”

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Authors
Konarska, M., Stewart, R. E., & McCarty, R.
Affiliations
University of Virginia (US)
Venue
Behavioral and Neural Biology
Publisher
Elsevier BV
Published
1990-03
Volume
53
Issue
2
Pages
231-243
ISSN
0163-1047 (ISSN-L)
OpenAlex
W1998274850
Cited by
53
References
36
Citations by year
2022: 1 · 2020: 1 · 2019: 3 · 2018: 1 · 2016: 3 · 2015: 1 · 2014: 3 · 2013: 2 · 2012: 2
FWCI
0.44
Type
journal article
Language
en
Open access
closed
Locations
  • Behavioral and Neural Biology (publishedVersion)
  • PubMed (publishedVersion)
Funders
  • National Institutes of Health (5k02mh000529-05, 5r01mh039970-02)
  • National Institute of Mental Health (MH 00529, MH 39970)
Topics
  • Life Sciences › Neuroscience › Behavioral Neuroscience › Stress Responses and Cortisol
  • Health Sciences › Medicine › Cardiology and Cardiovascular Medicine › Heart Rate Variability and Autonomic Control
  • Life Sciences › Neuroscience › Cognitive Neuroscience › Memory and Neural Mechanisms
Keywords
sympathoadrenal system, restraint stress, variable stress, norepinephrine, epinephrine, plasma catecholamines, blood pressure, heart rate, weight gain, rats
MeSH terms
Adrenal Medulla, Animals, Arousal, Blood Pressure, Epinephrine, Habituation, Psychophysiologic, Heart Rate, Male, Norepinephrine, Rats, Inbred Strains, Sympathetic Nervous System, Rats

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