Encyclopedia of Clinical Neuropsychology

2018 Edition
| Editors: Jeffrey S. Kreutzer, John DeLuca, Bruce Caplan


  • Eduardo LopezEmail author
Reference work entry
DOI: https://doi.org/10.1007/978-3-319-57111-9_23


EDX; Electromyography (EMG); Nerve conduction studies (NCS)


Electrodiagnosis is a neurophysiological study used to detect problems involving nerves or muscles.

Current Knowledge

Electrodiagnosis (EDX) as an extension of the neuromuscular/physical examination employs the anatomical principles of localization, searching for evidence of motor and sensory injury. It is most helpful in the evaluation of patients with problems of weakness, paresthesia, pain, or fatigue. Electrodiagnosis not only can support or confirm clinical diagnosis but suggest the severity or extent of the disorder. Electrodiagnosis may also help exclude other diagnosis and have an important prognostic role in guiding management. EMG of neuromuscular disease applies knowledge of basic physiological processes involved in impulse transmission in peripheral nerves, the motor unit, and muscles and changes produced in these processes by disease. Complications are minimal and include mild discomfort or...

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References and Readings

  1. Boon, A. J., Smith, J., & Harper, M. (2012). Ultrasound application in electrodiagnosis. PM&R, 4(1), 37–49.CrossRefGoogle Scholar
  2. Dillingham, T. (2011). Electrodiagnostic medicine II. Clinical evaluation and findings. In R. Brandom (Ed.), Physical medicine and rehabilitation (Vol. 10, 4th ed., pp. 195–220). Philadelphia: Saunders.CrossRefGoogle Scholar
  3. Dumitru, D., Zwarts, M. J., & Amato, A. A. (Eds.). (2002). Electrodiagnostic medicine (2nd ed.). Philadelphia: Hanley & Belfus, Inc..Google Scholar
  4. Johnson, E. W., & Pease, W. S. (Eds.). (2006). Practical electromyography (4th ed.). Philadelphia: Lippincott Williams Wilkins.Google Scholar
  5. Kimura, J. (2013). Electrodiagnosis in diseases of nerve and muscle: Principles and practice (4th ed.). New York: Oxford University Press.CrossRefGoogle Scholar

Copyright information

© Springer International Publishing AG, part of Springer Nature 2018

Authors and Affiliations

  1. 1.Rehabilitation MedicineNew York Medical College, Metropolitan HospitalNew YorkUSA