The journal of pain : official journal of the American Pain Society
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To understand when and why the provision of help by a partner of an individual with chronic pain (ICP) yields benefits, it is critical, according to self-determination theory, to consider the extent to which partners' helping responses are supportive of the basic psychological needs of the ICP, as well as the motivations underlying these helping responses. The present study (N = 141 couples), spanning 3 measurement moments over 6 months, investigated temporal associations between partners' helping motivation, ICPs' psychological needs, and ICPs' functioning across time (ie, well-being, psychological distress, and disability). Results showed that partners' autonomous or volitional helping motivation (time 1) predicted decreases in ICPs' need frustration (time 2) and ICPs' need frustration (time 2) predicted increases in ICPs' psychological distress (time 3). ⋯ Finally, the associations between ICPs' disability and both partners' helping motivation and ICPs' need-based experiences were nonsignificant. Implications for research and clinical practice are discussed. Perspective: Partners' helping motivations and ICPs' psychological needs seem to be important to consider when investigating the role of spousal responses, because they could (indirectly) predict changes in the well-being and psychological distress of ICPs over time.
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Self-distancing has been shown to alleviate emotional pain and to have potential efficacy for treating chronic pain and imagined acute pain, relative to self-immersing. This study examined the efficacy of self-distancing in relieving acute physical pain caused by a cold pressor task (CPT) in healthy adults. A total of 65 undergraduates were assigned pseudorandomly to 1 of 3 groups: 1) a self-distancing group, in which participants were instructed to "take a step back" to simulate their current painful experience as an observer, 2) a self-immersed group, in which participants' current painful experience was stimulated from the egocentric perspective, and 3) a control group, in which participants coped with pains in their spontaneous ways. ⋯ This result supports that self-distancing could relieve the acute pain induced by CPT. Perspective: This study presents a brief effective psychological intervention to manage acute pain. This result could potentially have clinical and everyday importance.
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Translational correlates to pain with activities after deep tissue injury have been rarely studied. We hypothesized that deep tissue incision causes greater activation of nociception-transmitting neurons evoked by muscle contraction. In vivo neuronal activity was recorded in 203 dorsal horn neurons (DHNs) from 97 rats after sham, skin-only, or skin + deep muscle incision. ⋯ PERSPECTIVE: Completion of various activities is an important milestone for recovery and hospital discharge after surgery. Skin + deep muscle incision caused greater activation of nociception-transmitting DHNs evoked by muscle contraction compared with skin-only incision. This result suggests an important contribution of deep muscle injury to activity-evoked hyperalgesia after surgery.
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Randomized Controlled Trial
Does sensorimotor incongruence trigger pain and sensory disturbances in people with chronic low back pain? A randomised cross-over experiment.
Chronic low back pain (CLBP) has major public health implications, and underlying mechanisms are still unclear. Sensorimotor incongruence (SMI)-an ongoing mismatch between top-down motor output and predicted sensory feedback-may play a role in the course of chronic nonspecific low back pain. The hypothesis of this study was that the induction of SMI causes sensory disturbances and/or pain in people with CLBP and healthy volunteers. ⋯ Therefore, the research hypothesis was not supported. PERSPECTIVE: The results of this study show that sensorimotor incongruence does not cause additional symptoms and pain in people with chronic low back pain. The conceptual premise that sensorimotor incongruence is an underlying contributor in the course of pain in this population is not supported.
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High-impact (disabling) pain diminishes the quality of life and increases health care costs. The purpose of this study was to identify the variables that distinguish between high- and low-impact pain among individuals with painful temporomandibular disorder (TMD). Community-dwelling adults (N = 846) with chronic TMD completed standardized questionnaires that assessed the following: 1) sociodemographic characteristics, 2) psychological distress, 3) clinical pain, and 4) experimental pain. ⋯ The characteristics that discriminated most effectively between people with low- and high-impact TMD pain included clinical pain features and the ability to cope with pain. PERSPECTIVE: This article presents the results of a multivariable model designed to discriminate between people with high- and low-impact pain in a community-based sample of people with painful chronic TMD. The findings emphasize the importance of catastrophizing, jaw limitation, and painful body sites associated with pain-related impact.