[Motor neurography: simultaneous recording using surface and needle electrodes. A comparative study of the proximal and distal latency together with the motor nerve conduction velocity].

The generally accepted interpretation that the application of surface and concentric needle electrodes for the recording of evoked muscle action potential in motor nerve neurography showed the same results has been reconsidered, especially because until now, over 20 years after the introduction of this neurophysiological method in routine clinical work, no exact statistically verified examinations have been done on this subject. Proximal and distal latency as well as motor nerve conduction velocity were determined in the following nerves in 100 subjects (71 healthy subjects and 29 patients): tibial, peroneal, ulnar, median. All neurographic parameters were obtained by means of simultaneous recording with surface and concentric needle electrodes and compared with one another. Concerning the ulnar nerve no statistically significant differences could be found. In the remaining three nerves, statistically significant differences could be detected for distal and proximal latency but not for motor nerve conduction velocity.