The effects of bipolar electrode montage on conduction velocity estimation from the surface electromyogram

R B J Beck, M O'Malley, J P van Dijk, P Nolan, D F Stegeman

Research output: Contribution to journalArticleAcademicpeer-review

9 Citations (Scopus)

Abstract

This study examines the influence of the bipolar electrode montage on conduction velocity (CV) estimation. Electrode montage refers to the combination of two parameters, the inter-electrode distance (IED), the distance between the two electrodes of a bipolar pair, and the inter-signal distance (ISD), the distance between two bipolar signals used to calculate CV. Data from the biceps brachii (BB) and tibialis anterior (TA) of healthy subjects are analysed. Two approaches are used for CV estimation. The first returns a single value per epoch. The second is based on finding velocity values from individual peaks in the signal and results in a peak velocity (PV) distribution being generated per epoch. It is concluded that CV estimation is significantly dependent on the choice of the (IED, ISD) electrode montage. The main results are that the electrode montage affects (1) the mean PV and CV estimates, (typically P < 0.001), (2) the degree of spatial variability, and (3) the width of the PV distributions. The combination of a small IED and large an ISD is recommended.

Original languageEnglish
Pages (from-to)505-514
Number of pages10
JournalJournal of Electromyography and Kinesiology
Volume14
Issue number4
DOIs
Publication statusPublished - Aug 2004
Externally publishedYes

Keywords

  • Analysis of Variance
  • Arm
  • Electrodes
  • Electromyography/instrumentation
  • Female
  • Humans
  • Isometric Contraction/physiology
  • Leg
  • Male
  • Motor Neurons/physiology
  • Muscle, Skeletal/innervation
  • Neural Conduction/physiology
  • Time Factors

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