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


Other title
Fibre Composition
Simulated SEMG
Type of item
Degree grantor
University of Alberta
Author or creator
Saunders, Scott A
Supervisor and department
Chiu, Loren (Physical Education and Recreation)
Examining committee member and department
Baudin, Pierre (Physical Education and Recreation)
Misiaszek, John (Occupational Therapy)
Jones, Kelvin (Physical Education and Recreation)
Physical Education and Recreation

Date accepted
Graduation date
Master of Science
Degree level
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.
Permission is hereby granted to the University of Alberta Libraries to reproduce single copies of this thesis and to lend or sell such copies for private, scholarly or scientific research purposes only. Where the thesis is converted to, or otherwise made available in digital form, the University of Alberta will advise potential users of the thesis of these terms. The author reserves all other publication and other rights in association with the copyright in the thesis and, except as herein before provided, neither the thesis nor any substantial portion thereof may be printed or otherwise reproduced in any material form whatsoever without the author's prior written permission.
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