[Evaluation of the evoked potentials in various acquired polyneuropathies (Guillain-Barré syndrome and chronic recurrent polyneuropathy). Preliminary report].

In 15 patients with acquired polyneuropathy (Guillain-Barré syndrome and chronic recurrent polyneuropathy) the conduction velocity was measured in the peripheral nerves of the upper and lower extremities, the latency of the F wave was determined, and the somatosensory evoked potentials were assessed stimulating the median enerve and posterior tibial nerve. The abnormalities were assessed in the parameters of the obtained somatosensory evoked potentials comparing them with the changes of F wave and the velocity of conduction in peripheral nerves. The sensitivity and usefulness of these methods in acquired polyneuropathies are discussed.