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The Neuromuscular System (Motor Units (ALL OR NONE LAW (Motor units cannot…
The Neuromuscular System
PNF
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Muscle spindles: sensitive proprioceptors that lie between skeletal muscle referred to as stretch receptors (detect how far and fast a muscle fibre is being stretched)
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when the muscle contracts isometrically they cause autogenic inhibition where the antagonist relaxes and lengthens
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Motor Units
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Motor units are different sizes depending on the function e.g. fine control would use a small muscle unit
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Types of Muscle fibre
Skeletal muscle is comprised of a mixture of all these types of fibre proportions of muscle fibre are genetically determined
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Fast twitch fibres:
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Type IIa: more resistant to fatigue so can be used in events where a longer burst of energy is required
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