[Bulbar evoked potentials in multiple sclerosis].

Clinical and electrophysiological examinations of 20 patients with disseminated sclerosis and 8 patients with disseminated encephalomyelitis were carried out. The data of the examinations were compared with those obtained from registering truncal evoked potentials. This comparison contributed to specifying the criteria for diagnostic differentiation between these two diseases. The changes of the truncal evoked potentials in disseminated sclerosis pointed to a process of demyelinization in the brain trunk. These changes, however, were not characteristic for disseminated encephalomyelitis.