Digit II, V – Wrist; Palm – Wrist

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

Original Settings

Sensitivity was 10 μV/division, low-frequency filter was 32 Hz, high-frequency filter was 3.2 kHz, sweep speed was 1–2 ms/division, and rate of pulse was 1/s. Duration of pulse 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 from the median and ulnar (R1, R2) nerves from stimulation of digit II and digit V (Fig. 1) and from stimulation of the palmar branches of the median and ulnar nerves (Fig. 2), respectively. For the median nerve (R1), 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). The active electrode (A) was placed proximal to the distal crease at the wrist, 8.5–11 cm proximal to the stimulating cathode in the palm (S1). The reference (R) was placed 2 cm proximally to the active electrode. For...


Ulnar Nerve Latency Difference Nerve Conduction Study Abductor Pollicis Brevis Sensory Nerve Action Potential 
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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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