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Motor Unit Summation?

Answer

Motor unit summation is a physical representation of how strongly a muscle contracts when it is stimulated. The degree of contraction of a skeletal muscle is influenced by the number of motor units being stimulated. The motor unit is defined as a motor neuron plus all of the muscle fibers that it innervates. Skeletal muscles consist of numerous motor units; this means that stimulating more motor units creates a stronger contraction in the skeletal muscle.
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