S71 Motor unit number index (MUNIX)

Loss of motor units (MUs) is the primary disease process in degenerative motor neuron diseases like amyotrophic lateral sclerosis (ALS). Reinnervation can compensate for MU loss. The net result is a reduced number of MUs, and increased MU size. The assessment of the number and size of MUs will be essential to study disease progression, and to study the efficacy of treatment.

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