Palm – Wrist; Wrist – Digit IV; Wrist – Digit I

Surface Recording Technique, Orthodromic and Antidromic Studies
  • Giuliano Gentili
  • Mario Di Napoli

Original Settings

Sensitivity was 5–50 μV/division, low-frequency filter was 20 Hz, high-frequency filter was 2 kHz, and the machine used was Nicolet Viking II electromyograph. Sweep speed, duration of pulse, and rate of pulse were not specified.


This study was performed in the supine position.


Three sets of nerve conduction studies were performed on each hand examined [ 1]. The three studies were chosen based on reports in the literature indicating a high sensitivity for the diagnosis of carpal tunnel syndrome (CTS) and because the units of measurement (latency difference between two sensory nerves) could be directly compared and/or added: (1) median–ulnar (8 cm) midpalmar orthodromic (palmdiff) – following the orthodromic method (Fig. 1), the median and ulnar sensory nerve conduction studies were performed. Palm to wrist sensory conduction studies were done orthodromically at the wrist. The active electrode (A) was placed proximal to the distal crease at the wrist;...


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    Kaul MP, Pagel KJ, Dryden JD (2001) When to use the combined sensory index. Muscle Nerve 24:1078–1082PubMedCrossRefGoogle Scholar
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    Bland JDP (2000) A neurophysiological grading scale for carpal tunnel syndrome. Muscle Nerve 23:1280–1283PubMedCrossRefGoogle Scholar

Copyright information

© Springer International Publishing Switzerland 2015

Authors and Affiliations

  • Giuliano Gentili
    • 1
  • Mario Di Napoli
    • 1
  1. 1.Neurological ServiceS. Camillo de’ Lellis General HospitalRietiItaly

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