Articles: chronic-pain.
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The present study sought to derive an algorithm using factor analysis and structural equation modeling (SEM) to describe headache and orofacial pain patients using measures of behavioral and psychological functioning. This investigation further examined whether the underlying factor structure differed in 3 presumed distinct diagnostic categories: myofascial, neuropathic, and neurovascular pain. ⋯ Analysis derived a 3-factor solution. The factors were Pain Impact, Illness Conviction, and Depression. SEM revealed the critical causal pathway showing that Depression determined Illness Conviction and Pain Impact. We conclude that the main target for pain treatment is depression. No differences in factor structure were found for the 3 diagnostic categories of myofascial, neuropathic, or neurovascular pain. This suggests that psychological processes are similar in chronic headache and orofacial pain patients despite their presumed distinct underlying pathophysiological mechanisms. SME is a powerful methodology to construct causal models that has been underutilized in the pain literature.
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This study was designed to determine whether affective inhibition and somatosensory amplification are elevated in patients with a history of myofascial face pain (MFP). These processes may underlie a tendency to express distress in somatic rather than affective terms, leading to somatized or masked depression. ⋯ Affective inhibition and somatosensory amplification are likely to be elevated in patients with MFP. Although not accounted for by psychiatric symptomatology, the possibility that these response styles are reactive to coping with chronic face pain cannot be ruled out.
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To examine the consistency of internist judgments about low back pain; to examine the influence of different clinical factors on those judgments. ⋯ While there is little agreement among internists regarding judgments of low back pain, individual physicians hold consistently to their opinions. These findings suggest that management of low back pain may be idiosyncratic, potentially compromising patient care.
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Background. Spinal cord stimulation (SCS) is being used with increasing frequency in the treatment of various chronic pain conditions. There is a paucity of reliable outcome data regarding changes in pain tolerance and peripheral sensory nerve function. ⋯ The results of this study appear to substantiate the postulates that both segmental and suprasegmental effects are involved in SCS-mediated analgesia. SCS modulates segmental large afferent fiber input as reflected by a statistically significant increase in large fiber CPTs (2000 Hz) at the symptomatic site post-SCS. A statistically significant increase in small fiber (5 Hz) CPTs at the control site suggests a central sensory (suprasegmental) modulating effect on nociceptive fiber activity. sNCT testing provided reliable outcome data for evaluating response to SCS.
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Chronic pain disorders, including fibromyalgia and myofascial pain syndrome often do not respond adequately to standard therapy. The cases reviewed herein suggest the strain and counterstrain (SCS) technique, described in 1981 by Jones, may be helpful in reducing pain and improving function in patients with localized myofascial pain syndromes. This was a case study and retrospective review of 20 patients who had had chronic pain for an average of 2.7 years and were treated with SCS for pain relief. ⋯ Areduction in pain and an increase in function of 50%-100% occurred in 19 of 20 patients immediately after SCS therapy. Partial improvement was maintained for 6 months in 11 of 20 patients, and 4 were still pain free. We believe that SCS techniques should be considered and evaluated further as adjunctive therapy for patients previously unresponsive to standard treatment for myofascial pain syndrome.