Which electrodiagnostic testing results suggest posterior tibial nerve?

Updated: Oct 15, 2019
  • Author: Minoo Hadjari Hollis, MD; Chief Editor: Thomas M DeBerardino, MD  more...
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Answer

Approximately 90% of patients with tarsal tunnel syndrome have abnormal findings on EMG and nerve conduction velocity (NCV) studies. However, in the presence of supportive history and physical examination, a normal electrodiagnostic study does not exclude the diagnosis of tarsal tunnel syndrome. Electrodiagnostic tests, however, can be extremely helpful in diagnosing concomitant polyneuropathy, systemic disorders, and lumbosacral radiculopathy.

Positive results on electrodiagnostic tests are an affirmation of the diagnosis of tarsal tunnel syndrome. Golovchinsky reported a high incidence of double crush syndrome with overlapping of peripheral entrapment syndromes and signs of proximal nerve damage of the corresponding nerves (partial muscle denervation or abnormalities of the F wave). [42] In such cases, simultaneous treatment of the two problems may be indicated.


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