What is evoked potential (EP) testing in electrodiagnosis?

Updated: Jan 27, 2020
  • Author: Adam B Agranoff, MD; Chief Editor: Stephen Kishner, MD, MHA  more...
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EPs are electrical signals generated by the nervous system in response to sensory stimuli. EP testing is the application of electrodiagnostic testing to the central nervous system (CNS). [22, 23] These tests are a clinically useful means to do the following:

  • Demonstrate abnormal sensory function when the neurologic examination results do not reveal abnormalities

  • Reveal clinically unsuspected pathology when demyelinating diseases are suggested [24]

  • Determine the anatomic distribution of a disease process

  • Objectively monitor a patient's progress or deterioration over time.

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