Wrist – Arm, Axilla; Palm, Wrist – Arm; Digit II – Arm

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

Original Settings

Sensitivity was 4–10 μV/division, low-frequency filter was 10 Hz, high-frequency filter was 2 kHz, sweep speed was 2 ms/division, duration of pulse was 0.2 ms, and the machine used was a TECA TD20 two-channel electrodiagnostic unit. Rate of pulse was not specified.


This study was performed in the supine position.


The authors [ 1] performed three different nerve conduction techniques: (1) Following the orthodromic method, mixed nerve action potentials (MNAPs) were recorded proximally at the arm (R1) and at the axilla (R2), 35 and 25 cm distal to the sternal notch (measured with the arm externally rotated and abducted to 90 °C), respectively (Fig. 1). Authors used stainless steel disks 1 cm in diameter applied with conductive gel, and the optimal location of the active recording (A) electrode was determined as the site at which submaximal stimulation produced the largest visible contraction in the distal median innervated muscles. A reference (R)...


  1. 1.
    Chassin SL, Little JW, DeLisa JA (1987) Compound nerve action potentials from the median and ulnar nerves. Arch Phys Med Rehabil 68:31–35PubMedGoogle 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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