Stress-induced allodynia--evidence of increased pain sensitivity in healthy humans and patients with chronic pain after experimentally induced psychosocial stress

Experimental stress has been shown to have analgesic as well as allodynic effect in animals. Despite the obvious negative influence of stress in clinical pain conditions, stress-induced alteration of pain sensitivity has not been tested in humans so far. Therefore, we tested changes of pain sensitiv...

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Veröffentlicht in:PloS one 2013-08, Vol.8 (8), p.e69460-e69460
Hauptverfasser: Crettaz, Benjamin, Marziniak, Martin, Willeke, Peter, Young, Peter, Hellhammer, Dirk, Stumpf, Astrid, Burgmer, Markus
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container_title PloS one
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Marziniak, Martin
Willeke, Peter
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Hellhammer, Dirk
Stumpf, Astrid
Burgmer, Markus
description Experimental stress has been shown to have analgesic as well as allodynic effect in animals. Despite the obvious negative influence of stress in clinical pain conditions, stress-induced alteration of pain sensitivity has not been tested in humans so far. Therefore, we tested changes of pain sensitivity using an experimental stressor in ten female healthy subjects and 13 female patients with fibromyalgia. Multiple sensory aspects of pain were evaluated in all participants with the help of the quantitative sensory testing protocol before (60 min) and after (10 and 90 min) inducing psychological stress with a standardized psychosocial stress test ("Trier Social Stress Test"). Both healthy subjects and patients with fibromyalgia showed stress-induced enhancement of pain sensitivity in response to thermal stimuli. However, only patients showed increased sensitivity in response to pressure pain. Our results provide evidence for stress-induced allodynia/hyperalgesia in humans for the first time and suggest differential underlying mechanisms determining response to stressors in healthy subjects and patients suffering from chronic pain. Possible mechanisms of the interplay of stress and mediating factors (e.g. cytokines, cortisol) on pain sensitivity are mentioned. Future studies should help understand better how stress impacts on chronic pain conditions.
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Despite the obvious negative influence of stress in clinical pain conditions, stress-induced alteration of pain sensitivity has not been tested in humans so far. Therefore, we tested changes of pain sensitivity using an experimental stressor in ten female healthy subjects and 13 female patients with fibromyalgia. Multiple sensory aspects of pain were evaluated in all participants with the help of the quantitative sensory testing protocol before (60 min) and after (10 and 90 min) inducing psychological stress with a standardized psychosocial stress test ("Trier Social Stress Test"). Both healthy subjects and patients with fibromyalgia showed stress-induced enhancement of pain sensitivity in response to thermal stimuli. However, only patients showed increased sensitivity in response to pressure pain. 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Our results provide evidence for stress-induced allodynia/hyperalgesia in humans for the first time and suggest differential underlying mechanisms determining response to stressors in healthy subjects and patients suffering from chronic pain. Possible mechanisms of the interplay of stress and mediating factors (e.g. cytokines, cortisol) on pain sensitivity are mentioned. Future studies should help understand better how stress impacts on chronic pain conditions.</abstract><cop>United States</cop><pub>Public Library of Science</pub><pmid>23950894</pmid><doi>10.1371/journal.pone.0069460</doi><tpages>e69460</tpages><oa>free_for_read</oa></addata></record>
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subjects Adult
Analgesics
Animals
Anxiety
Biology
Caffeine
Chronic pain
Chronic Pain - etiology
Chronic Pain - physiopathology
Cortisol
Cytokines
Female
Fibromyalgia
Fibromyalgia - physiopathology
Hospitals
Humans
Hyperalgesia
Hyperalgesia - etiology
Hyperalgesia - physiopathology
Kinases
Medicine
Middle Aged
Muscle pain
Pain
Pain - etiology
Pain - physiopathology
Pain Measurement - methods
Pain perception
Pain sensitivity
Pain Threshold - physiology
Patients
Physiology
Psychological aspects
Psychological stress
Psychometrics
Psychotherapy
Rheumatology
Sensitivity
Sensitivity enhancement
Sensory testing
Social interactions
Stress (Psychology)
Stress, Psychological - complications
Stress, Psychological - physiopathology
Studies
Thermal stimuli
Young Adult
title Stress-induced allodynia--evidence of increased pain sensitivity in healthy humans and patients with chronic pain after experimentally induced psychosocial stress
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