Palm to Distal Forearm – Digit II

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

Original Settings

Sensitivity was 50 μV/division, low-frequency filter was 20 Hz, high-frequency filter was 2 kHz, sweep speed was 1 ms/division, and the machine used was a specially designed amplifier with a short blocking time (1 ms) and low noise (0.5-μV RMS at bandwidth of 2 kHz). Duration of pulse was not specified.


This study was performed in the supine position.


Following the antidromic method [ 1], signals were recorded from digit II (index finger) using ring electrodes (Fig. 1). The active electrode (A) was placed around the proximal interphalangeal joint of digit II; the reference (R) was placed on the distal interphalangeal joint of the same finger. Ground (G) electrode was placed around the forearm (author used a Velcro strap).


Median Nerve Nerve Conduction Study Great Efficiency Conduction Time Distal Forearm 
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  1. 1.
    Kimura J (1979) The carpal tunnel syndrome: localization of conduction abnormalities within the distal segment of the median nerve. Brain 102:619–635PubMedCrossRefGoogle Scholar
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    Nathan PA, Meadows KD, Doyle LS (1988) Sensory segmental latency values of the median nerve for a population of normal individuals. Arch Phys Med Rehabil 69:499–501PubMedGoogle Scholar
  3. 3.
    Nathan PA, Keniston RC, Meadows KD et al (1993) Predictive value of nerve conduction measurements at the carpal tunnel. Muscle Nerve 16:1377–1382PubMedCrossRefGoogle 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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