Jove
Visualize
Contact Us
JoVE
x logofacebook logolinkedin logoyoutube logo
ABOUT JoVE
OverviewLeadershipBlogJoVE Help Center
AUTHORS
Publishing ProcessEditorial BoardScope & PoliciesPeer ReviewFAQSubmit
LIBRARIANS
TestimonialsSubscriptionsAccessResourcesLibrary Advisory BoardFAQ
RESEARCH
JoVE JournalMethods CollectionsJoVE Encyclopedia of ExperimentsArchive
EDUCATION
JoVE CoreJoVE BusinessJoVE Science EducationJoVE Lab ManualFaculty Resource CenterFaculty Site
Terms & Conditions of Use
Privacy Policy
Policies

Related Experiment Videos

Detecting single fiber contributions to motor unit action potentials.

D W Stashuk1

  • 1Department of Systems Design Engineering, University of Waterloo, Ontario, Canada.

Muscle & Nerve
|February 19, 1999
PubMed
Summary

Detecting individual muscle fiber action potentials (MFAPs) within motor unit action potentials (MUAPs) is improved by analyzing MUAP acceleration. This method significantly enhances the detection of fiber contributions near the electrode.

Related Concept Videos

You might also read

Related Articles

Articles linked to this work by shared authors, journal, and citation graph.

Sort by
Same author

Long-Term Endurance and Power Training May Facilitate Motor Unit Size Expansion to Compensate for Declining Motor Unit Numbers in Older Age.

Frontiers in physiology·2019
Same author

Failure to expand the motor unit size to compensate for declining motor unit numbers distinguishes sarcopenic from non-sarcopenic older men.

The Journal of physiology·2018
Same author

The reliability of methods to estimate the number and size of human motor units and their use with large limb muscles.

European journal of applied physiology·2018
Same author

Decomposition of intramuscular EMG signals using a knowledge -based certainty classifier algorithm.

Annual International Conference of the IEEE Engineering in Medicine and Biology Society. IEEE Engineering in Medicine and Biology Society. Annual International Conference·2013
Same author

Simulation of electromyographic signals.

Journal of electromyography and kinesiology : official journal of the International Society of Electrophysiological Kinesiology·2010
Same author

Decision support for QEMG.

Supplements to Clinical neurophysiology·2010

Area of Science:

  • Neuromuscular Physiology
  • Biomedical Engineering
  • Electrophysiology

Background:

  • Motor unit action potentials (MUAPs) are complex signals reflecting the summed activity of multiple muscle fibers.
  • Accurate detection of individual muscle fiber action potentials (MFAPs) is crucial for understanding neuromuscular function and diagnosing disorders.
  • Current methods for analyzing MUAPs have limitations in resolving individual MFAP contributions.

Purpose of the Study:

  • To evaluate the efficacy of detecting MFAP contributions to MUAPs using simulated data.
  • To compare the performance of single-fiber (SF) and concentric needle (CN) electrodes in MFAP detection.
  • To determine the optimal analysis method (filtered MUAPs vs. MUAP acceleration) for identifying significant MFAP contributions.

Main Methods:

Related Experiment Videos

  • Simulated MUAPs were generated to represent recordings from SF and CN electrodes.
  • Various MFAP-acceleration thresholds were applied to define significant fiber contributions.
  • Peak detection algorithms were used on both filtered MUAPs and MUAP accelerations.
  • Performance was assessed based on the percentage of significant MFAP contributions detected.

Main Results:

  • Analysis of MUAP acceleration detected 80% (SF) and 84% (CN) of significant MFAP contributions, a substantial improvement over filtered MUAP analysis (46% SF, 50% CN).
  • A significant contribution threshold of 7.5 kV/s² was used for comparison.
  • Most detected MFAP contributions originated from fibers within approximately 350 micrometers of the electrode.

Conclusions:

  • MUAP acceleration analysis, particularly with CN electrodes, shows strong correlation with individual fiber activity.
  • This method holds promise for accurately measuring fiber density and neuromuscular jitter.
  • Further investigation into MUAP acceleration may refine diagnostic capabilities in neuromuscular research.