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Post-traumatic stress disorder (PTSD) often co-occurs with chronic pain. Neither the underlying mechanism of this comorbidity nor the nature of pain perception among subjects with PTSD is well defined. This study is the first systematic and quantitative evaluation of pain perception and chronic pain in subjects with PTSD. The study group consisted of 32 outpatients with combat- and terror-related...
Opioids are widely prescribed for non-cancer pain conditions (NCPC), but there have been no large observational studies in actual clinical practice assessing patterns of opioid use over extended periods of time. The TROUP (Trends and Risks of Opioid Use for Pain) study reports on trends in opioid therapy for NCPC in two disparate populations, one national and commercially insured population (HealthCore...
Although models have been proposed to explain common factors that maintain comorbid pain and PTSD [Sharp TJ, Harvey AG. Chronic pain and posttraumatic stress disorder: mutual maintenance? Clin Psychol Rev 2001; 21: 857–77], the exact nature of the relationship between these two conditions and their impact on quality of life (QOL) is unknown. The aim of the present investigation was to examine the...
Most imaging studies on the human pain system have concentrated so far on the spatial distribution of pain-related activity. In the present study, we investigated similarities and differences between the spatial and temporal patterns of brain activity related to touch vs. pain perception. To this end, we adopted an event-related functional magnetic resonance imaging (fMRI) paradigm allowing us to...
Although chronic pain and depression commonly co-occur, causal relationships have yet to be established. A reciprocal relationship, with depression increasing pain and vice versa, is most frequently suggested, but experimental evidence is needed to validate such a view. The most straightforward approach would be a demonstration that increasing or decreasing depressed mood predictably modifies pain...
Functional magnetic resonance imaging (fMRI) has been used to map cerebral activations related to nociceptive stimuli in rodents. Here, we used fMRI to investigate abnormally increased responses to noxious or innocuous stimuli, in a well-established rat model of chronic neuropathic pain induced by photochemical lumbar spinal cord injury. In this model, a subpopulation of rats exhibits allodynia-like...
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