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Wrist – Hand (2L muscle)

Surface Recording Technique, Study to the Second Lumbrical (2L) Muscle
  • Giuliano Gentili
  • Mario Di Napoli
Chapter

Original Settings

Sensitivity was 500 μV/division, low-frequency filter was 3 Hz, high-frequency filter was 10 kHz, sweep speed was 2 ms/division, and the machine used was a 2-channel Medelec Synergy EMG machine. Duration of pulse was not specified.

Position

This study was performed in the supine position.

Recording

Using the technique [ 1] by Preston and Logigian [ 2], the authors placed the active electrode (A) slightly lateral to the midpoint of the third metacarpal space, over the belly (motor point) of both the second lumbrical (2L) and interossei (INT) muscles (Fig. 1). The reference (R) was placed over a bony prominence of the proximal interphalangeal joint of digit II. The motor point to the 2L was identified by an initial negative deflection with the fastest rise time. Surface recording was made with monopolar recording electrodes. The ground (G) electrode position was not mentioned in the text; it could be placed on the palm or on the dorsum of the hand. The figure shows the...

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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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