Digit II – Wrist, Digit III – Wrist,Palm – Wrist

Surface Recording Technique, Orthodromic Study
  • Giuliano Gentili
  • Mario Di Napoli

Original Settings

Sensitivity was 20 μV/div (digit–wrist) and 50 μV/div (palm–wrist), low-frequency filter was 2 Hz, high-frequency filter was 10 kHz, duration of pulse was 0.1 ms, and rate of pulse was approximately 1/s. Sweep speed and the machine used were not specified.


This study was performed in the supine position.


Following the orthodromic method [ 1], signals were recorded using surface electrodes at the wrist (R) from the median nerve by distal stimulation (digit II and digit III) and stimulation on the palm. Electrodes were placed between the tendons of the flexor carpi radialis (FCR) and the palmaris longus (PL) muscles (ideally proximal to the distal wrist crease). From the cathode stimulating points (−), proximal distance of 14 cm for digit II–wrist and digit III–wrist recordings (Figs. 1 and 2) and a fixed distance of 8 cm for the palm–wrist recording (Fig. 3) were premeasured and marked over the median nerve proximally to the wrist crease as...


  1. 1.
    Di Benedetto M, Mitz M, Gerda EK et al (1986) New criteria for sensory nerve conduction especially useful in diagnosing carpal tunnel syndrome. Arch Phys Med Rehabil 67:586–589PubMedGoogle Scholar
  2. 2.
    Lew HL, Date ES, Pan SS et al (2005) Sensitivity, specificity, and variability of nerve conduction velocity measurements in carpal tunnel syndrome. Arch Phys Med Rehabil 86:12–16PubMedCrossRefGoogle 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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