Palmar digital neuropathy with anatomical variation of median nerve: Usefulness of orthodromic technique: A case report

Research output: Contribution to journalArticle


Anatomic variation of palmar digital nerve pathways were reported in several cases. Selective exploration of palmar digital nerves with a nerve conduction study has been challenging, because of technical issues. We report a patient who received bilateral carpal tunnel release operation, complaining of a tingling sensation, and hypoesthesia on the middle and ring fingers. An electrodiagnostic study revealed a sensory neuropathy of palmar digital nerve of the left median nerve, supplying the ulnar side of the middle finger, and radial side of the ring finger. She underwent re-operation of open left carpal tunnel release, and a branching site of common digital nerves of the median nerve was identified not at the palm, but at a far proximal site around the distal wrist crease. Usefulness of an orthodromic sensory conduction study was clarified to eliminate volume conducted response or co-activation of nearby nerves in the patient with selective involvement of palmar digital nerve.

Original languageEnglish
Pages (from-to)341-346
Number of pages6
JournalAnnals of Rehabilitation Medicine
Issue number3
Publication statusPublished - 2019 Jun 1



  • Carpal tunnel syndrome
  • Electrodiagnosis
  • Median nerve
  • Median neuropathy

ASJC Scopus subject areas

  • Rehabilitation

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