User:Jessicapettitt/Bayesian Motor Unit Number Estimation

Motor units are the nerves that are responsible for the contraction of muscles. Each muscle group is served by several motor units. Each motor unit (figure 1) consists of an anterior horn cell in the spinal cord, a motor axon running within the peripheral nerve, its terminal branches and the muscle fibres that are supplied by that axon. One anterior horn cell is capable of supplying many muscle fibres. The true number of motor units within a single muscle is not known. In degenerative neuromuscular diseases, such as Parkinson’s disease, Huntington’s disease, Alzheimer’s disease and amyotrophic lateral sclerosis (ALS) the number of motor units decrease with time.

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