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

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.


This study was performed in the supine position.


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...


Digital Wrist Palm Digit Median Crack Peak Latency Negative Peak Amplitude 
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    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
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    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
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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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