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Departments of Neurophysiology (Drs. Leblhuber, Reisecker, Witzmann, and Deisenhammer) and Radiology (Dr. Boehm-Jurkovic), Wagner-Jauregg-Krankenhaus, Linz. Austria.
We evaluated 24 patients with radiologically verified cervical disk prolapse. EMG abnormalities appeared in 67% of cases studied; dermatomal somatosensory evoked potentials revealed 85% abnormal findings on the affected side, but also revealed abnormalities in adjacent segments. In 38%, F responses were abnormal. We found electrodiagnostic abnormalities at levels without a disk prolapse, probably due to degenerative spondylopathic changes and beginning consecutive vascular compromise.
Address correspondence and reprint requests to Dr. Leblhuber, Department of Neurophysiology, Wagner-Jauregg-Krankenhaus, Wagner-Jauregg-Weg 15, A-4020 Linz, Austria.
Received October 21, 1987. Accepted for publication in final form June 13, 1988.
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