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The changes in the transmission functioning of the ulnar nerve in a high power magnetic field
B Mansouri1, H Pakdaman, S Yassami
1Shaheed Beheshti University of Medical Sciences, Thran, Islamic Republic of Iran. bmansouri@in-box.net
Introduction:
The present study aims at exploring the changes in the functioning of the ulnar nerve in a high power magnetic field.
Methods:
12 volunteers with a healthy peripheral nervous system participated in the study. The ulnar nerve was selected from the upper organs as the site for study. The functioning of both the sensory and motor parts of the ulnar nerve in normal conditions was electromyographically tested. Then, using the same setting, the functioning of the nerve was electromyographically tested within a high power magnetic field (0.2 Tesla). With regard to the sensory function, the distal latency and the amplitude were examined. With regard to the motor section, the duration, amplitude of the evoked potentials, and latency from two sites--distal and proximal--were examined. These results of the two readings, taken in normal condition and in a high power magnetic field, as well as the motor neural conduction velocity, were compared.
Results:
The statistical analyses indicated that the changes in both the distal latency and amplitude of the sensory part of the ulnar nerve were significant. However, the changes in the motor function of the nerve were not significant.