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• W2918128520 abstract "Introduction: Individuals with chronic musculoskeletal pain show impairments in their pain-modulatory capacity. Stress-induced analgesia (SIA) is a paradigm of endogenous pain inhibition mainly tested in animals. It has not been tested in patients with chronic pain despite the important role of stress in pain modulation and the chronicity process. Methods: SIA was tested in 22 patients with chronic musculoskeletal pain and 18 healthy participants matched for age and gender. Pain thresholds, pain tolerance and suprathreshold pain sensitivity were examined before and after a cognitive stressor. Additionally, chronic stress levels, pain catastrophizing and pain characteristics were assessed as potential modulating factors. Results: Patients with chronic musculoskeletal pain compared to healthy controls showed significantly impaired SIA (F(1,37)=5.63, p=.02) for pain thresholds, but not pain tolerance (F(1,37)=0.05, p=.83) and stress-induced hyperalgesia (SIH) to suprathreshold pain ratings (F(1,37)=7.76, p=.008). Patients (r(22)=-0.50, p=.05) but not controls (r(18)=-0.39, p=.13) with high catastrophizing had low SIA as assessed by pain thresholds. In controls suprathreshold pain ratings were significantly positively correlated with catastrophizing (r(18)=0.57, p=.03) and life-time stress exposure (r(18)=0.54, p=.03). In patients neither catastrophizing (r(22)=0.21, p=.34) nor stress exposure (r(22)=0.34, p=.34) were associated with suprathreshold SIH. Discussion: Our data suggest impairments of SIA and SIH in patients with chronic musculoskeletal pain. Catastrophizing was associated with deficient SIA in the patients and higher pain ratings in controls. High life time stress also increased pain ratings in the controls." @default.
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• W2918128520 date "2019-02-20" @default.
• W2918128520 modified "2023-09-27" @default.
• W2918128520 title "Stress-induced analgesia in patients with chronic musculoskeletal pain and healthy controls" @default.
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