Electromyograph (EMG) machines evaluate and record the electrical activity produced by skeletal muscles. Nerve conduction study (NCS) is used to evaluate the function of the motor and sensory nerves of the human body. Evoked potentials (EPs) are the electrical signals produced by the nervous system in response to an external stimulus. The EasyTrace is one of Clarity Medical’s flagship products. It is a 2 channel highly miniaturized and ultraportable EMG/NCS/EP machine. EasyTrace is designed to be used in conjunction with a laptop computer and derives all operating power from USB connection without the need for an external AC power source, making it highly portable.