The demonstration of the size principle in humans using macro electromyography and precision decomposition

Muscle & Nerve
J F Jabre, N T Spellman

Abstract

We set out to study the relationship between a motor unit's size and firing rates and its recruitment threshold and recruitment order. The data were collected from the first dorsal interosseous muscle of 11 normal subjects and analyzed using the precision decomposition and macro electromyography techniques. Our study showed that the recruitment order of a motor unit varies directly with its recruitment threshold (P<0.00005) and that there is a progressive increase in the macro potential size of successively recruited motor units (P=0.002). The firing rates of motor units vary inversely with their recruitment order (P=0.006), the smaller, earlier recruited units consistently reaching higher firing rates than the larger, later recruited units. This study conforms the existence of a size principle of motor unit recruitment in humans and reveals the interactions between a motor unit's size and its firing rate properties.

References

Sep 1, 1991·Muscle & Nerve·J F Jabre
Apr 1, 1990·Journal of Neurology, Neurosurgery, and Psychiatry·T VogtB Pfeifer
Aug 1, 1988·Muscle & Nerve·L J Dorfman, K C McGill
Apr 1, 1973·The Journal of Physiology·H S Milner-BrownR Yemm
Jan 1, 1973·The Journal of Physiology·H S Milner-BrownR Yemm
Aug 1, 1984·Electroencephalography and Clinical Neurophysiology·B Mambrito, C J De Luca
Aug 1, 1982·The Journal of Physiology·C J De LucaA P Xenakis
Aug 1, 1982·The Journal of Physiology·C J De LucaA P Xenakis
Jun 1, 1980·Journal of Neurology, Neurosurgery, and Psychiatry·E Stålberg

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Citations

Jul 15, 2005·Medicine and Science in Sports and Exercise·Danielle J LovelessDonald A Schneider
Aug 27, 2011·European Journal of Applied Physiology·C Scott BickelJesse C Dean
Jun 18, 2009·Muscle & Nerve·Miklós LukácsSándor Beniczky
Dec 31, 2016·Microcirculation : the Official Journal of the Microcirculatory Society, Inc·Coral L MurrantNicole M Novielli
Mar 16, 2018·Journal of Applied Physiology·J P MolenaarB G van Engelen

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