Electromyography is a test widely used in medical science to assess the health of the neuromotor system, among many other uses it can have for the development of biomedical projects. The electromyograph is equipment used to activate, record, conduct and expose nerve and muscle action potentials for the purpose of assessing nerve and muscle function. Surface EMG signals (EMGS) are essentially a one-dimensional pattern, so any signal processing technique for feature extraction and pattern recognition can be applied to this type of signal. The information extracted from EMGS signals is selected in such a way as to minimise error in the control of myoelectric prosthesis systems. In neuromuscular pathology, the starting point is always a fundamental physiological concept: the motor unit (MU) (Lidell and Sherrington, 1925).