What is the role of EMG in the workup of myofascial pain (MP)?

Updated: Mar 15, 2019
  • Author: Jennifer E Finley, MD, FAAPMR; Chief Editor: Dean H Hommer, MD  more...
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Needle electromyography (EMG) examination of trigger points (TrPs) in humans and rabbits has shown high-voltage spike activity and spontaneous, low-voltage endplate noise, which is considered characteristic but not pathognomonic. Surface EMG has been used in experiment protocols to monitor muscle activity in TrPs. Ultrasonography has been used to visualize the LTR elicited by needle penetration.

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