PMC3362224_01
Conduction block in median nerves. Right limb in the upper half and left limb in the lower one. Nerve stimulation at the wrist, elbow and Erb point in an up-to-down order. The decline in negative peak amplitude was between 55 and 90% in comparison with distal stimulation.
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PMC3362224_01_crn-0004-0071-g01.jpg
F1
Electromyography revealed a pure motor demyelinating polyneuropathy of the four limbs with several conduction blocks between 55 and 90% in the upper limbs (fig. 1).