Spinal and Supra-Spinal Pain Mechanisms in Patients With Fibromyalgia
| Status: | Recruiting |
|---|---|
| Conditions: | Chronic Pain, Fibromyalgia, Pain |
| Therapuetic Areas: | Musculoskeletal, Rheumatology |
| Healthy: | No |
| Age Range: | 18 - 65 |
| Updated: | 3/27/2019 |
| Start Date: | April 16, 2018 |
| End Date: | May 2020 |
| Contact: | Melyssa Godfrey |
| Email: | painresearch@medicine.ufl.edu |
| Phone: | 352-265-8901 |
Fibromyalgia (FM) patients have increased windup (WU). However, WU of FM patients is only
quantitatively but not qualitatively different from healthy controls (HC). Thus WU
abnormalities of FM patients could be the result of supra-spinal and not the result of spinal
pain mechanisms. The study team will test this hypothesis by sensitizing FM patients with
topical capsaicin. The study team hypothesize that at baseline the slopes of sensitivity
adjusted WU of FM patients are not statistically different from HC. However, after capsaicin
application, the slopes of sensitivity adjusted WU will be significantly different from
baseline and greater than those of HC, suggesting central sensitization. This would imply
that FM patients are sensitive to heat pain but not sensitized.
quantitatively but not qualitatively different from healthy controls (HC). Thus WU
abnormalities of FM patients could be the result of supra-spinal and not the result of spinal
pain mechanisms. The study team will test this hypothesis by sensitizing FM patients with
topical capsaicin. The study team hypothesize that at baseline the slopes of sensitivity
adjusted WU of FM patients are not statistically different from HC. However, after capsaicin
application, the slopes of sensitivity adjusted WU will be significantly different from
baseline and greater than those of HC, suggesting central sensitization. This would imply
that FM patients are sensitive to heat pain but not sensitized.
Inclusion Criteria:
- individuals diagnosed with fibromyalgia will have pain of duration > 6 months and
meeting the 1990 Research Diagnostic Criteria for FM (ACR).
- healthy, pain-free age matched controls without chronic pain
Exclusion Criteria:
- Allergy to red chili peppers;
- Pregnant;
- Significant hearing loss;
- Presence of chronic disease (e.g. cancer, cardiovascular disease, liver disease,
kidney disease, diabetes, etc.).
- FM patients must be willing to discontinue or hold their FM related medications for at
least 5 half-lives.
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