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Updated: Apr 18, 2026

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E-norms: a method to extrapolate reference values from a laboratory population

Joe F Jabre1, Matthew C Pitt, Jacquie Deeb

  • 1*Department of Neurology, Boston University School of Medicine, Boston, Massachusetts, U.S.A.; †Department of Clinical Neurophysiology, Great Ormond Street Hospital for children NHS Foundation Trust, London, United Kingdom; ‡Department of Neurophysiology, Queen's Hospital, Barking, Havering and Redbridge University Hospitals NHS Trust, London, United Kingdom; and §Department of Public Health and Community Medicine, Tufts University School of Medicine, Boston, Massachusetts, U.S.A.

Journal of Clinical Neurophysiology : Official Publication of the American Electroencephalographic Society
|January 13, 2015
PubMed
Summary

Extrapolated norms (e-norms) successfully derive reference values for Stimulated Single Fiber EMG jitter in pediatric populations. This method provides reliable data when direct collection is challenging, aiding in diagnosing neuromuscular disorders.

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