The origin of the premotor potential recorded from the second lumbrical

Yoshihisa Masakado, L. Abe, M. Kawakami, K. Suzuki, T. Ota, A. Kimura, N. Takahashi, M. Liu

Research output: Contribution to journalArticle

3 Citations (Scopus)

Abstract

Purpose: When recording with a palm electrode, a premotor potential (PMP) precedes the compound muscle action potential evoked from the second lumbrical muscle following median nerve stimulation. The origin of the premotor potential has remained uncertain. The aim of this study was to determine whether the PMP-2L is a SNAP derived from antidromically activated digital sensory branches of the median nerve. Methods: We recorded three active electrodes were placed over the second lumbrical muscle, the third lumbrical muscle, the fourth lumbrical muscle by multi-channel recordings. Results: PMPs are recorded only over the median digital sensory branches after stimulating the median nerve, while they are recorded only over the ulnar branch after stimulating the ulnar nerve. Conclusions: We conclude that the origin of the PMP is a SNAP arising from antidromically activated digital sensory branches.

Original languageEnglish
Pages (from-to)9-11
Number of pages3
JournalElectromyography and Clinical Neurophysiology
Volume48
Issue number1
Publication statusPublished - 2008 Jan 1

    Fingerprint

Keywords

  • Median nerve
  • Multi-channel recording
  • Premotor potential
  • Sensory nerve action potential
  • Ulnar nerve

ASJC Scopus subject areas

  • Physiology
  • Clinical Neurology
  • Physiology (medical)

Cite this

Masakado, Y., Abe, L., Kawakami, M., Suzuki, K., Ota, T., Kimura, A., Takahashi, N., & Liu, M. (2008). The origin of the premotor potential recorded from the second lumbrical. Electromyography and Clinical Neurophysiology, 48(1), 9-11.