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Wrist – Digit II, Wrist – Digit V

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

Original Settings

Low-frequency filter was 2 Hz, high-frequency filter was 2 kHz, and the machine used was a TECA MS20 EMG device. Sensitivity, sweep speed, duration of pulse, and rate of pulse were not specified.

Position

This study was performed in the supine position.

Recording

Following the antidromic method [ 1], signals were recorded using surface electrodes from the median and ulnar nerves separately. For the median nerve (R1), the active recording electrode (A) was placed between the proximal interphalangeal joint and the metacarpophalangeal joint of digit II; the reference electrode (R) was placed 3 or 4 cm (depending on the size of the hand) distal to the active electrode over the same digit (Fig. 1). For the ulnar nerve (R2), the active recording electrode (A) was placed between the proximal interphalangeal joint and the metacarpophalangeal joint of digit V; the reference electrode (R) was placed 3 or 4 cm (depending on the size of the hand) distal to the active electrode...

References

  1. 1.
    Nesathurai S, Gwardjan A, Kamtah A (1999) Median to ulnar sensory nerve action potential amplitude ratio as an electrodiagnostic adjunct for carpal tunnel syndrome. Arch Phys Med Rehabil 80:756–759PubMedCrossRefGoogle Scholar
  2. 2.
    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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