Within military populations, chronic pain conditions and posttraumatic stress disorder (PTSD) frequently co-occur, however, little research has examined the psychophysiological correlates of this comorbidity among active-duty soldiers. The current study examined physiological reactivity to negative affective stimuli among 30 active duty soldiers with chronic pain conditions treated with long-term opioid therapy. Participants completed a diagnostic interview and self-report measures. Then, their heart rate and skin temperature were recorded during an affective picture-viewing task. Soldiers with PTSD exhibited greater increases in the ratio of low-to-high frequency heart rate variability (LF/HF HRV) while viewing negative affective images than soldiers without PTSD. PTSD symptom severity was positively associated with LF/HF HRV reactivity and negatively associated with skin temperature reactivity. Additionally, opioid craving was associated with LF/HF HRV and skin temperature reactivity among soldiers with PTSD. Taken together, the results of the present study provide evidence for heightened sympathetic nervous system reactivity among soldiers with comorbid chronic pain and PTSD, underscoring the importance of intervening on potential risk factors for these conditions.
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| http://dx.doi.org/10.1016/j.psychres.2022.114394 | DOI Listing |
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