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Digit I – Wrist

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

Original Settings

Sensitivity was 5 μV/division and sweep speed was 1 ms/division. Low-frequency filter, high-frequency filter, duration of pulse, rate of pulse, and the machine used were not specified.

Position

This study was performed in the supine position.

Recording

Following the orthodromic method [ 1], sensory nerve action potentials (SNAPs) were recorded at the wrist (Fig. 1). For the median nerve (R1), the active recording electrode was placed proximally to the distal wrist crease; for the radial nerve (R2) the active recording electrode was placed over the superficial radial nerve at the proximal border of the “anatomical snuff box.” The reference electrodes were placed proximally. The ground (G) electrode position was not specified in the report; the figure shows the ground electrode placed on the palm.

Keywords

Median Nerve Carpal Tunnel Syndrome Ulnar Nerve Radial Nerve Nerve Conduction Study 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

References

  1. 1.
    Smith J (1981) Radial nerve conduction in patients with carpal tunnel syndrome. Appl Neurophysiol 44:363–367PubMedGoogle Scholar
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    Gilliatt RW, Sears TA (1958) Sensory nerve action potentials in patients with peripheral nerve lesions. J Neurol Neurosurg Psychiatry 21:109–118PubMedCentralPubMedCrossRefGoogle Scholar
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    Cassvan A, Ralescu S, Shapiro E et al (1988) Median and radial sensory latencies to digit I as compared with other screening tests in carpal tunnel syndrome. Am J Phys Med Rehabil 67:221–224PubMedCrossRefGoogle Scholar
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    Trojaborg W, Grewal RP, Weimer LH et al (1996) Value of the latency measurements to the small palm muscles compared to other conduction parameters in the carpal tunnel syndrome. Muscle Nerve 19:243–245PubMedCrossRefGoogle Scholar
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    Ghavanini MRA, Kazemi B, Jazayeri M et al (1996) Median-radial sensory latencies as new test in carpal tunnel syndrome. Electromyogr Clin Neurophysiol 36:171–173PubMedGoogle Scholar
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    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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