motor unit recruitment


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motor unit recruitment

the bringing into activity of additional motor neurons, which causes additional muscle fibers to contract. As more units are recruited and as the frequency of discharge increases, muscle tension increases. The pattern of motor unit recruitment varies, depending on the inherent properties of specific motor neurons.
References in periodicals archive ?
Recently, von Tscharner and Nigg [21] and Farina [6] discussed whether or not the surface EMG power spectrum could be used to provide information regarding motor unit recruitment and muscle fiber type composition.
They assumed that motor unit recruitment overlap was the only mechanism contributing to the change in force.
Prior studies investigating force and isometric contractions found mostly a curvilinear increase in SEMG amplitude with increasing muscle force because of concurrent increases in motor unit recruitment and firing rate up to 80%-MVC, after which increases are due primarily to increases in firing rate (Coburn et al, 2005).
The pattern of motor unit recruitment is an important factor in shaping the myoelectric intensity spectrum.
called upon from a cadre of neural pathways to perform a task) according to what is known as the "size principle of motor unit recruitment.
Electromyography tests motor unit recruitment and the integrity of the muscle innervation.
in addition, tempo running mimics the pattern of muscle motor unit recruitment during actual competition.
Specifically, differences in motor unit recruitment order and activation frequencies, as well as imprecise control of muscle forces, will contribute to the increased fatigability observed with NMES [3].
Neural aspects, such as motor unit recruitment, synchronisation, and co-contraction may be responsible for force and power increases following acute vibration.
With poor motor unit recruitment due to neuropathy, there's no squeeze felt at all.
Since momentum reduces muscular tension, it can limit total motor unit recruitment and also increase accelerative forces that can potentially create muscle and/or joint injury.