What is the role of dermatomal and myotomal evoked potentials (EPs) in electrodiagnosis?

Updated: Jan 27, 2020
  • Author: Adam B Agranoff, MD; Chief Editor: Stephen Kishner, MD, MHA  more...
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Dermatomal and myotomal EP studies are much more technically difficult to perform and should not be considered routine procedures. Stimulation occurs along the dermatome or myotome, with recordings at the cortex. These tests have demonstrated greater specificity than have SSEPs and are used frequently in clinical research.

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