Wrist – Digit IV

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

Original Settings

Sensitivity was 20 μV/division, sweep speed was 1 ms/division, duration of pulse was 0.05 ms, and the machines used were a TECA TE-4 (34 subjects), a TECA model M (1 subject), and neurodiagnostic (2 subjects). Low-frequency filter, high-frequency filter, and rate of pulse were not specified.


This study was performed in the supine position.


Following the antidromic method [ 1], signals were recorded using ring electrodes, 14 cm distally from the wrist to digit IV (Fig. 1). The active electrode (A) was placed at the base of digit IV. The reference (R) was placed on the junction between the middle phalanx and the distal phalanx, 4 cm distal to the active electrode. Ground (G) was placed on the palm of the hand. Median (R1) and ulnar (R2) nerve recordings were made separately.


Carpal Tunnel Syndrome Ulnar Nerve Nerve Conduction Study Diabetic Polyneuropathy Distal Motor Latency 
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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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