MOTOR CONDUCTION VELOCITIES IN AMYOTROPHIC LATERAL SCLEROSIS, POLYRADICULONEURITIS AND CHARCOT-MARIE-TOOTH'S DISEASE

Abstract

Measurements of the motor conduction velocities in the peripheral nerves have been performed in Charcot-Marie-Tooth''s disease. Of 10 typical cases studied, 9 showed a pronounced slowing of the conduction velocities. These were measured in most cases in the arms because the denervation of the feet was so pronounced that no measurement was possible. Polyradiculoneuritis. Seven cases were studied with this disease. All of them showed a slowing of the motor conduction velocity in the legs. Of the 5 cases also studied in the upper extremity 2 showed pathological values. Amyotrophic lateral sclerosis. Of 21 patients with this disease, only 3 showed pathological values. These were, however, only slightly below the lower limit for normal values. In 3 fairly advanced cases remarkably high conduction velocities were found. The results are briefly discussed.