Electrodiagnostic evaluation of carpal tunnel syndrome

Muscle Nerve. 2011 Oct;44(4):597-607. doi: 10.1002/mus.22208.


Carpal tunnel syndrome (CTS) is the most common nerve entrapment. Electrodiagnostic (EDX) studies are a valid and reliable means of confirming the diagnosis. This monograph addresses the various EDX techniques used to evaluate the median nerve at the wrist. It also demonstrates the limitations of EDX studies with a focus on the sensitivity and specificity of EDX testing for CTS. The need to use reference values for populations such as diabetics and active workers, where normative values differ from conventional cutoffs used to confirm suspected CTS, is presented. The value of needle electromyography (EMG) is examined.

Publication types

  • Review

MeSH terms

  • Carpal Tunnel Syndrome / diagnosis*
  • Electric Stimulation / methods
  • Electrodiagnosis / methods*
  • Hand / innervation
  • Humans
  • Neural Conduction / physiology*
  • Predictive Value of Tests
  • Reaction Time / physiology
  • Sensitivity and Specificity
  • Wrist / innervation