How to interpret normal electromyographic findings in patients with an alleged history of polio

Journal of Rehabilitation Medicine
Arne Sandberg, E Stalberg

Abstract

In some patients with a history of polio, the electromyography is normal, not showing the typical neurogenic signs. The aim of this study was to explain the normal findings in electromyography, especially in paralytic polio. Retrospective study. Concentric needle electromyography, macro electromyography (including single fibre electromyography) and neurography were performed in various combinations in 688 patients with an alleged history of polio. Thirty-five patients with paralytic polio had normal or minimally abnormal neurophysiology. In 6 patients the diagnosis of polio was rejected and was instead found to be other diagnoses. Three patients had a very atypical history. Of the 26 with possible paralytic polio, 17 showed a strong suspicion of previous paralytic polio without any neurophysiological signs of degeneration of the anterior horn cells. If neurophysiological findings are normal in patients with a history of polio, the original diagnosis may be incorrect. However, the absence of electromyography changes does not entirely exclude a previous history of polio with transient functional loss without degeneration of anterior horn cells vulnerable for later functional impairment.

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Citations

Dec 6, 2017·Journal of Neurosciences in Rural Practice·Mehmet Güney ŞenolMehmet Saraçoğlu
Aug 6, 2019·Frontiers in Neurology·Stacey Li Hi ShingPeter Bede
Nov 9, 2019·PM & R : the Journal of Injury, Function, and Rehabilitation·Koshiro SawadaToshikazu Kubo
May 25, 2010·Lancet Neurology·Henrik GonzalezKristian Borg

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