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Related Experiment Videos

Chronic fatigue: electromyographic and neuropathological evaluation

S Connolly1, D G Smith, D Doyle

  • 1Department of Clinical Neurophysiology, Middlesex Hospital, London, UK.

Journal of Neurology
|July 1, 1993
PubMed
Summary

Single fibre electromyography may help identify chronic fatigue patients with underlying muscle disorders. This technique revealed abnormalities in muscle fibre density in individuals with significant myalgia, suggesting a primary muscle condition.

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Area of Science:

  • Neurology
  • Muscle Physiology
  • Immunology

Background:

  • Chronic fatigue syndrome (CFS) affects numerous individuals globally.
  • The etiology of CFS is complex and often multifactorial.
  • Identifying subgroups within CFS is crucial for targeted treatment.

Purpose of the Study:

  • To investigate the utility of single fibre electromyography (SFEMG) in diagnosing muscle disorders in patients with chronic fatigue.
  • To correlate SFEMG findings with clinical symptoms like myalgia and results from muscle biopsy and creatine kinase levels.

Main Methods:

  • Single fibre electromyography (SFEMG) of the extensor digitorum communis (EDC) muscle was performed on 35 patients with chronic fatigue.
  • Patients were categorized based on fatigue type (post-viral, non-specific, or possible muscle disease).

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  • Creatine kinase (CK) levels and EDC muscle biopsies were analyzed in conjunction with SFEMG.

    • Main Results:

    • Of 11 patients with significant myalgia, 6 showed abnormalities in muscle fibre density via SFEMG.
    • Five of these patients also exhibited non-specific abnormalities on muscle biopsy.
    • Creatine kinase levels remained normal in all patients with myalgia and SFEMG abnormalities.

    Conclusions:

    • Single fibre electromyography (SFEMG) may serve as a valuable tool for identifying a subset of chronic fatigue patients with potential primary muscle disorders.
    • Abnormalities in muscle fibre density detected by SFEMG, particularly in conjunction with myalgia, warrant further investigation for underlying myopathies.
    • SFEMG offers a potential diagnostic avenue for chronic fatigue patients where standard tests like CK levels are inconclusive.