The peripheral nervous system consists of the sensory and motor system and is located outside the brain and in the spinal cord. EMG electromyography is a diagnostic tool that allows us to frame the neurological diseases of the peripheral nervous system. Nerves, muscles, sensory organs, that is, the sensory and motor system, can be affected by diseases just like any other organ and bodily structure. The EMG has proven to be an indispensable means of diagnosing and treating these pathologies.