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Wrist – Digit I, Wrist – Digit II, Wrist – Digit III, Wrist – Digit IV, Palm – Digit II, Palm – Digit III

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

Original Settings

Sensitivity was 20 μV/div (digit–wrist) and 50 μV/div (palm–wrist), low-frequency filter was 2 Hz, high-frequency filter was 10 kHz, duration of pulse was 0.1 ms, and rate of pulse was approximately 1/s. Sweep speed and the machine used were not specified.

Position

This study was performed in the supine position.

Recording

Following the antidromic method [ 1], signals were recorded using surface ring electrodes placed distally to the digits from the proximal stimulation of the median nerve (S) on the palm and at the wrist. Sensory nerve action potentials (SNAPs) were recorded from digit I (thumb), digit II (index), digit III (middle), and digit IV (ring). Active ring (A) electrode was placed on the proximal interphalangeal joint of digit I, digit II, digit III, and digit IV; the reference ring (R) electrode was placed on the distal (R) interphalangeal joint of the same digits. Each wrist–digit recording was made separately, at a 14 cm distance between the recording...

References

  1. 1.
    Di Benedetto M, Mitz M, Gerda EK et al (1986) New criteria for sensory nerve conduction especially useful in diagnosing carpal tunnel syndrome. Arch Phys Med Rehabil 67:586–589PubMedGoogle Scholar
  2. 2.
    Lew HL, Date ES, Pan SS et al (2005) Sensitivity, specificity, and variability of nerve conduction velocity measurements in carpal tunnel syndrome. Arch Phys Med Rehabil 86:12–16PubMedCrossRefGoogle Scholar
  3. 3.
    Kothari MJ, Rutkove SB, Caress JB et al (1995) Comparison of digital sensory studies in patients with carpal tunnel syndrome. Muscle Nerve 18:1272–1276PubMedCrossRefGoogle Scholar
  4. 4.
    Lee HJ, Kwon HK, Kim DH et al (2013) Nerve conduction studies of median motor nerve and median sensory branches according to the severity of carpal tunnel syndrome. Ann Rehabil Med 37:254–262PubMedCentralPubMedCrossRefGoogle Scholar
  5. 5.
    Lee HJ, Kwon HK (2004) Electrophysiologic classification of severity of carpal tunnel syndrome. J Korean Assoc EMG-Electrodiagn Med 6:1–3Google 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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