Faculty Collaboration Database

Effects of surface electrode size on computer simulated surface motor unit potentials. Electromyogr Clin Neurophysiol 1999;39(5):259-65

Date

07/28/1999

Pubmed ID

10421996

Scopus ID

2-s2.0-0033058774 (requires institutional sign-in at Scopus site)   15 Citations

Abstract

Surface myoelectric signals are recorded in motor nerve conduction, fatigue and kinesiologic studies using discrete electrodes. Single site recordings have limited means to reduce cross-talk and to enhance timing and quantification of relative muscular activity. These limitations are compounded by the effects of the electrode size. A grid electrode would reduce some of these limitations. However, an optimum grid electrode requires detail examination of the effects of the size of individual electrodes and the interelectrode distance. The purpose of this study is to investigate the temporal and spatial effects of the electrode size on surface motor unit potentials (SMUP). Muscle fiber action potentials and surface electrodes are simulated by computer models. Peak to peak amplitude, the mean frequency of SMUP, and the muscle conduction velocity were calculated as functions of the size of the electrode. The random variations of these parameters due to systematic errors are also simulated and investigated.

Author List

Ferdjallah M, Wertsch JJ, Harris GF

Authors

Gerald F. Harris Emeritus Professor in the Orthopaedic Surgery department at Medical College of Wisconsin
Gerald Harris PhD Director in the Orthopaedic Research Engineering Center (OREC) department at Marquette University

MESH terms used to index this publication - Major topics in bold

Action Potentials
Algorithms
Artifacts
Computer Simulation
Electrodes
Electromyography
Equipment Design
Humans
Models, Biological
Motor Neurons
Movement
Muscle Fatigue
Muscle Fibers, Skeletal
Neural Conduction
Signal Processing, Computer-Assisted
Surface Properties