Gary B. Rollman

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Experimental measures of responsiveness to painful and non-painful stimuli as well as measures of typical and present clinical pain were assessed in 26 female patients with fibromyalgia and in an equal number of age-matched healthy women. Pressure pain thresholds, determined by means of a dolorimeter, were lower in the patients compared to the control(More)
The hypervigilance model of pain perception states that chronic pain patients have a heightened sensitivity to pain (e.g. low threshold and tolerance) because of increased attention to external stimulation and a preoccupation with pain sensations. This study tested the hypothesis that individuals with fibromyalgia, a chronic pain disorder of undetermined(More)
Neuropathic pain (NeP), generated by disorders of the peripheral and central nervous system, can be particularly severe and disabling. Prevalence estimates indicate that 2% to 3% of the population in the developed world suffer from NeP, which suggests that up to one million Canadians have this disabling condition. Evidence-based guidelines for the(More)
Since past studies concerning the effects of naloxone on nociception have yielded inconclusive findings, the variables of pain test, baseline sensitivity, and stress condition were examined. Within a pure-bred strain of rats, consistent individual differences did not occur. All three measures of pain responsiveness demonstrated hyperalgesic effects of(More)
OBJECTIVE To examine possible deficiencies in endogenous pain modulating mechanisms in fibromyalgia patients compared with matched pain-free control subjects. DESIGN/SUBJECTS/METHODOLOGY: Pain reduction was investigated in 25 female patients with fibromyalgia and 26 age-matched healthy women using the diffuse noxious inhibitory controls (DNIC) paradigm.(More)
Epidemiologic, clinical, and experimental evidence points to sex differences in musculoskeletal pain. Adult women more often have musculoskeletal problems than do men. Discrepant findings regarding the presence of such differences during childhood and adolescence continue. Biologic and psychosocial factors might account for these differences. The authors(More)
Thresholds for sensation, pain, and tolerance were obtained from 20 male and 20 female observers who received trains of electrical pulses applied to the volar forearm. Also determined were estimates of sensory magnitude for a series of stimuli that spanned the pain sensitivity range (PSR) between pain threshold and tolerance, as well as Weber fractions for(More)
Proponents of the use of signal detection theory (SDT) in the assessment of pain modulation have generally looked for changes in d' to indicate a reduction of sensory function, and a change in criterion to indicate a modification of the subject's response bias or attitudinal predisposition. In the first experiment, both assumptions failed to receive(More)