The separate techniques of motor nerve studies and sensory or mixed nerve studies are further explained with the aid of diagrams. The simple calculations of sensory and motor conduction velocities are described. Because the motor nerve tapers distally where it becomes unmyelinated and terminates in a neuromuscular junction, measurement of motor conduction velocity requires stimulation at two sites. This also provides an additional measurement, the distal latency. The effect on the amplitude and form of recorded potentials, particularly sensory ones, on conduction distance is discussed and illustrated with clinical examples. The pitfalls of submaximal stimulation are underlined in further clinical examples.