This test can detect disorders of nerve or muscle fibers in the early stages of the disease.

Electromyographic processing is needed to differentiate neurogenic and myogenic sputum and atrophy, myotonia, myotonic dystrophies, myocardial gravis (with repetitive stimulation), show early stages of denervation, diagnose generalized neural damage and evaluate the stage of development of the disease after neurogenic damage. This examination also tests the frequency of tremor, sequence of activation of the dystonic muscles and performs a test on latent tetanus.