Utilizing Physiological Principles of Motor Unit Recruitment to Reduce Fatigability of Electrically-Evoked Contractions: A Narrative Review

2018 ◽  
Vol 99 (4) ◽  
pp. 779-791 ◽  
Author(s):  
Trevor S. Barss ◽  
Emily N. Ainsley ◽  
Francisca C. Claveria-Gonzalez ◽  
M. John Luu ◽  
Dylan J. Miller ◽  
...  
Keyword(s):  
Motor Unit ◽  
Narrative Review ◽  
Motor Unit Recruitment ◽  
Electrically Evoked Contractions ◽  
Evoked Contractions

Motor unit activation order during electrically evoked contractions of paralyzed or partially paralyzed muscles

2002 ◽  
Vol 25 (6) ◽  
pp. 797-804 ◽  
Author(s):  
Christine K. Thomas ◽  
Gary Nelson ◽  
Lara Than ◽  
Inge Zijdewind
Keyword(s):  
Motor Unit ◽  
Motor Unit Activation ◽  
Electrically Evoked Contractions ◽  
Evoked Contractions

Determining patterns of motor recruitment during locomotion

2002 ◽  
Vol 205 (3) ◽  
pp. 359-369 ◽  
Author(s):  
James M. Wakeling ◽  
Motoshi Kaya ◽  
Genevieve K. Temple ◽  
Ian A. Johnston ◽  
Walter Herzog
Keyword(s):  
Motor Unit ◽  
Frequency Band ◽  
Fibre Type ◽  
Low Frequency ◽  
Motor Units ◽  
Motor Unit Recruitment ◽  
Medial Gastrocnemius ◽  
Fibre Types ◽  
Myoelectric Signals ◽  
Frequency Bands

SUMMARY Motor units are the functional units of muscle contraction in vertebrates. Each motor unit comprises muscle fibres of a particular fibre type and can be considered as fast or slow depending on its fibre-type composition. Motor units are typically recruited in a set order, from slow to fast, in response to the force requirements from the muscle. The anatomical separation of fast and slow muscle in fish permits direct recordings from these two fibre types. The frequency spectra from different slow and fast myotomal muscles were measured in the rainbow trout Oncorhynchus mykiss. These two muscle fibre types generated distinct low and high myoelectric frequency bands. The cat paw-shake is an activity that recruits mainly fast muscle. This study showed that the myoelectric signal from the medial gastrocnemius of the cat was concentrated in a high frequency band during paw-shake behaviour. During slow walking, the slow motor units of the medial gastrocnemius are also recruited, and this appeared as increased muscle activity within a low frequency band. Therefore, high and low frequency bands could be distinguished in the myoelectric signals from the cat medial gastrocnemius and probably corresponded, respectively, to fast and slow motor unit recruitment. Myoelectric signals are resolved into time/frequency space using wavelets to demonstrate how patterns of motor unit recruitment can be determined for a range of locomotor activities.

The effect of rate of torque development on motor unit recruitment and firing rates during isometric voluntary trapezoidal contractions

2019 ◽  
Vol 237 (10) ◽  
pp. 2653-2664 ◽  
Author(s):  
Jonathan D. Miller ◽  
C. J. Lund ◽  
Marissa D. Gingrich ◽  
Kyle L. Schtul ◽  
Mandy E. Wray ◽  
...  
Keyword(s):  
Motor Unit ◽  
Motor Unit Recruitment ◽  
Firing Rates ◽  
Rate Of Torque Development ◽  
Torque Development
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