For sensory nerve conduction studies, I think many look primarily at the latencies for prolongation (indicating demyelination), for a low amplitude (indicating axon loss), or generally if the response is NR. Conduction velocities between the stimulation at the wrist and the G1 can be helpful, particularly if they are very slow (like <30 m/s). Some will even perform sensory nerve conduction studies at the wrist and the elbow to get a true conduction velocity between those two points. Generally I think they are more helpful for motor NCS. I'm interested to hear others opinions.