How does electrical noise affect the results of electromyography (EMG) and nerve conduction studies?

Updated: Aug 20, 2018
  • Author: Stephen Kishner, MD, MHA; Chief Editor: Jonathan P Miller, MD  more...
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Answer

Electrodiagnostic testing is very sensitive and can be subject to the electrical noise in the environment.  Flourescent lights, computers, fans, and so on that generate 60 Hz are common sources of electrical disturbance. To minimize this interference, the examiner should ensure that skin is clean from dirt and oil, has sufficient electrode jelly, the electrodes are firmly in contact with the skin, and that the ground is between the stimulator and recording electrodes. [12]


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