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Updated: Aug 7, 2026

Myo-mechanical Analysis of Isolated Skeletal Muscle
Published on: February 22, 2011
Principles of force gradation in skeletal muscles
1Department of Medical Physiology, University of Groningen, Groningen, The Netherlands. dhkernell@hotmail.com
Abstract:
A brief survey is given of how motoneurons and motor units are used for the gradation of muscle force during motor behavior. Basic properties of motoneurons and muscle fibers, including major kinds of functional specialization along the axis of 'fast' vs. 'slow', are reviewed. The principles underlying the rate and recruitment gradation of force are described, stressing that the properties of motoneurons and muscle fibers are matched to automate important aspects of the gradation procedure. Recent investigations concerning synaptically evoked changes in the discharge properties of motoneurons receive special attention, including 'plateau' currents and, under appropriate conditions, self-sustained 'plateau' discharges.
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