The Effects of Varying Fibre Composition on Simulated SEMG Signals in the Time and Frequency Domains

  • Author / Creator
    Saunders, Scott A
  • Whether SEMG can be used as a tool to estimate muscle fibre type concentrations remains an interesting question in muscle physiology. It is speculated that fast twitch motor units may have increased conduction velocities and that this may lead to an increased SEMG mean power frequency when compared to their slow twitch counterparts. Unfortunately, the true relationship between conduction velocity and fibre type remains a mystery. This research makes use of a SEMG simulation model to help analyze how changes in contraction time, conduction velocity and twitch force assignment distributions within a muscle impact a simulated signal. Variations in contraction time and twitch force impacts SEMG signals in the time but not frequency domains. On the other hand, conduction velocity is proportional to SEMG frequency content but has no impact on force production. This work suggests that further extension of simulation models could include methods of varying fibre type compositions.

  • Subjects / Keywords
  • Graduation date
    Fall 2012
  • Type of Item
  • Degree
    Master of Science
  • DOI
  • License
    This thesis is made available by the University of Alberta Libraries with permission of the copyright owner solely for non-commercial purposes. This thesis, or any portion thereof, may not otherwise be copied or reproduced without the written consent of the copyright owner, except to the extent permitted by Canadian copyright law.