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single-fiber electromyography (EMG)

Indications: - neuromuscular disease - myasthenia gravis - Eaton-Lambert syndrome Procedure: - single fiber techniques record variation in single potentials in individual fibers - usual macro EMG techniques measure the summated electrical activity of all fibers of a motor unit Clinical significance: - abnormalities are found in neuromuscular diseases, myasthenia gravis, Eaton-Lambert syndrome & others

General

electromyography (EMG)

References

  1. Harrison's Principles of Internal Medicine, 13th ed. Companion Handbook, Isselbacher et al (eds), McGraw-Hill Inc. NY, 1995, pg 694-95