Electromyography is a method of recording electrical muscle activity during reflex or voluntary contractions. It offers information about neuromuscular physiology, being useful in highlighting afflicted structures in various neurological diseases, and especially in the diagnosis of muscle and neuromuscular diseases. In children, the importance of using cutaneous electromyography is given by the fact that it allows the diagnosis of progressive muscular dystrophies (Duchenne, the benign Becker-Kiener form), of congenital myopathies, as well as myositis of various causes (viral infections, inflammatory diseases, drugs or intense physical exercise).