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Dynamic Chiropractic – February 27, 1995, Vol. 13, Issue 05
Dynamic Chiropractic
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Dynamic Chiropractic

Fibromyalgia Syndrome Arising de novo from Trauma

By Arthur Croft, DC, MS, MPH, FACO

Fibromyalgia syndrome (FS) is a chronic disorder involving not regions but the entire body, both above and below the waist and on both sides. It is much more prevalent in females and has generally not been associated with trauma. It has, however, been associated with more than 46 different infectious, metabolic, neurologic, and neoplastic diseases.1 In such cases it is referred to as "secondary fibromyalgia syndrome." When free-standing it is usually referred to as "primary fibromyalgia syndrome" or simply "fibromyalgia."

Patients with FS have a number of complaints in common and these are listed in Table 1, which is from Wolfe2 and is compiled from the American College of Rheumatology (ACR) 1990 criteria study.3

Table 1: Characteristics of FS

Symptom Percent of patients
1. Widespread pain 97.6
2. Tenderness (11 of 18 tender points) 90.1
3. Fatigue 81.4
4. Morning stiffness ( >15 min.) 77.0
5. Sleep disturbance 74.6
6. Paresthesias 62.8
7. Headache 52.8
8. Anxiety 47.8
9. Dysmenorrheic history 40.6
10. Sicca symptoms 35.8
11. Prior depression 31.5
12. Irritable bowel syndrome 29.6
13. Urinary urgency 26.3
14. Raynaud's phenomenon 16.7

The ACR also established 18 "tender points" which are commonly found in these patients. To qualify as having FS a patient must have the following:

  1. widespread pain (above and below the waist and on both sides of the body) for at least three months duration;

     

  2. axial spine pain (cervical, chest, thoracic or lumbar);

     

  3. at least 11 of 18 "tender points";

     

  4. at least three of the following:
a) fatigue
b) sleep disturbance
c) anxiety
d) irritable bowel syndrome
e) headache
f) paresthesiae

It is, of course, difficult sometimes to decide just what it is that constitutes fatigue. And what level of anxiety is important? How often should headaches occur? Does one per week qualify? The vague and nebulous nature of these criteria has raised a fair amount of criticism from some authorities. On the other hand, there is a strong association between poor sleep and increased symptom expression, and Romano4 has recently correlated irritable bowel syndrome with FS rather definitively.

Several authors have noted that patients with FS tend to be rather asthenic. Mengshoel et al.,5 found FS patients to fatigue faster than controls. Bennet6 feels that the weight of evidence supports the theory of the muscle as the end organ responsible for FS. Unfit muscles are more likely to be injured. He also speculates on the role of sleep disturbance suggesting that growth hormone is decreased and this may also delay the healing process. With regard to the sleep disturbance, a number of investigators have suggested the possibility of a neurohormonal mechanism7 which might be responsible. Years ago, physicians began to notice that patients with FS complained of poor sleep. Investigation of this uncovered the fact that most of these patients have alpha wave intrusion into their stage IV delta wave sleep.8 In essence, their quality sleep is interrupted by a very shallow and non-restorative sleep. They typical awaken and feel unrested. It was also noted by using a visual analog pain scale that their pain was inversely proportional to their perceived quality of using a visual analog pain scale that their pain was inversely proportional to their perceived quality of sleep (i.e., they had more pain on the days following nights of poor quality sleep).

Serotonin is known to modulate pain and play an important role in the regulation of deep sleep. If serotonin is deficient in FS patients, it would explain these sleep disturbances and possibly also their increased sensitivity to pain.7 In a recent small study, serotonin was found to be significantly lower in FS patients.9 This may be due in part to excessive platelet re-uptake.7

Going on this information, another group theorized that by giving supplemental tryptophan, a precursor of serotonin, they might improve sleep and decrease the pain.10 In the end they did measure an improvement in sleep but also an increase in pain. However, this study was repeated by Caruso et al.,11 who showed improvement in all clinical parameters with the admiration of 5-hydroxytryptophan. One wonders if the effects will last. Experience with migraine headaches has shown that tryptophan is effective for only 4-6 weeks.

Another important finding is that substance P is a key player in FS syndrome. It normally has a dampening effect on sensory nerve discharge in the presence of high concentration of sertonin. When serotonin is depleted, it does not exert this control. Substance P has been found to be elevated in the CNS of FS patients.12 There is also evidence that hyperparathyroidism13 and hypothyroidism may play significant parts in FS.14,15 In these cases, however, FS would be described as secondary FS.

Recently, several authors have begun to cite trauma as an etiological factor in the development of fibromyalgia16-18. In reality, what we see clinically ranges for the de novo appearance of the disorder to traumatic aggravation of pre-existing fibromyalgia. In the latter case, patients who may have been previously symptomatic yet functional may become dysfunctional following their injury. It is also likely that complex interrelationships exist between endocrine, neurological, and musculoskeletal systems in such cases that virtually defy precise understanding from a pathophysiologic standpoint. It is also likely that patients predisposed to developing fibromyalgia may, after an injury, suffer not only from FS but from myofascitis, thoracic outlet syndrome, or other conditions as well. Further research is needed to investigate the possibility that some cases of FS arise directly from trauma. I have recently reported four cases in which this appears to have occurred.19

References

  1. Diagnostic and Statistical Manual of Mental Disorders, 3rd ed (DSM-III). American Psychiatric Association, Washington, D.C., 1980.

     

  2. Wolfe F. Diagnosis of fibromyalgia. J Musculoskel Med 53-69, 1990.

     

  3. Wolfe F, Smythe HA, Yannus MB et al. The American College of Rheumatology 1990 criteria for the classification of fibromyalgia: report of the multicenter committee. Arthritis Rheum 33: 160-172, 1990.

     

  4. Romano TJ. Concurrent fibromyalgia and irritable bowel syndrome. Pain Pract 3(1): 4-7, 1991.

     

  5. Mengskoel AM, Ferre A, Komhnaes HB. Muscle strength and aerobic capacity in primary fibromyalgia. Clin Exper Rheum 8: 475-479, 1990.

     

  6. Bennet RM. Muscle physiology and cold reactivity in fibromyalgia syndrome. Rheum Dis Clin N Amer 15(1): 135-147, 1989.

     

  7. Russell IJ. Neurohormonal aspects of fibromyalgia syndrome. Rheum Dis Clin N Amer 15(1): 149-167, 1989.

     

  8. Moldofsky H. Rheumatic pain modulation syndrome. The interrelationship between sleep, central nervous system serotonin, and pain. In: Critchley M, Friedman M, Gorini S, et al., eds. Advances in Neurology, vol 33. New York: Raven Press, 1982, pp 51-57.

     

  9. Russell IJ, Bowden CL, Michalek J, et al. Imipramine receptor density on platelets of patients with fibrositis syndrome: correlation with disease severity and response to therapy. Arthritis Rheum 30: 563, 1987.

     

  10. Moldofsky H, Warsh JJ. Plasma tryptophan and musculoskeletal pain in non-articular rheumatism ("fibrositis syndrome"). Pain 5: 65-71, 1978.

     

  11. Caruso I, Puttini PS, Cazzola M, Azzolini V. Double-blind study of 5-hydroxytryptophan vs. placebo in the treatment of primary fibromyalgia syndrome. J Intl Med Res 18: 201-209, 1990/

     

  12. Vaeroy H, Helle R, Forre O, et al. Elevated CSF levels of substance P and high incidence of Raynaud's phenomenon in patients with fibromyalgia: new features for diagnosis. Pain 32: 21-26, 1988.

     

  13. Beetham WP, Jr. Diagnosis and management of fibrositis syndrome and psychogenic rheumatism. Med Clin N Amer 63: 433-439, 1979.

     

  14. Wilke WS, Sheeler LR, Makarowlki WS. Hypothyroidism presenting symptoms of fibrositis. J Rheumatol 8: 626-631, 1987.

     

  15. Forslind K, Frediksson E, Nived O. Does primary fibromyalgia exist? Br J Rheum 29: 368-370, 1990.

     

  16. Moldofsky H, Wong MTH, Lue FA. Litigation, sleep, symptoms, and disabilities in post-accident pain (fibromyalgia). Journal of Rheumatology 20(11): 1935-1940, 1993.

     

  17. Zimmermann M. Pathophysiological mechanism of fibromyalgia. Clinical Journal of Pain 7(S1): S8-S15, 1991.

     

  18. Culclasure TF, Enzenauer RJ, West SG. Post-traumatic stress disorder presenting as fibromyalgia. American Journal of Medicine 94(5): 548-549, 1993.

     

  19. Croft AC. Post-traumatic fibromyalgia -- case reports. Submitted.

Arthur Croft, DC, MS, FACO
San Diego, California

Click here for more information about Arthur Croft, DC, MS, MPH, FACO.

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