Normal values of nerve conduction in children and adolescents.

Healthy children and adolescents (n = 128) ranging in age from 6 to 20 years and in height from 114 to 193 cm underwent studies of median, peroneal and sural nerves bilaterally, including nerve conduction velocity, amplitude and motor distal latencies. Arms and legs were heated in all subjects to obtain skin temperatures around 34 degrees C. Both motor and sensory nerve conduction velocities were found to correlate more with height than with age. There was a strong negative correlation between height and peroneal conduction velocity (r = -0.40, P < 0.0001). On the contrary, a positive correlation was found between height and both median sensory (r = 0.30, P < 0.0001) and motor (r = 0.22, P < 0.001) conduction velocities. Skin temperature, even near 34 degrees C, had a strong effect on conduction velocity and motor distal latencies. It is concluded that consideration of height and temperature will improve the diagnostic safety of nerve conduction measurements in children and young adults.