LONG-TERM OBSERVATION OF THE CHANGING BRAIN-STEM AUDITORY-EVOKED POTENTIALS IN A CASE OF INFANTILE OPSOCLONUS-POLYMYOCLONIA SYNDROME

Brainstem auditory evoked potential (BAEP) studies were repeatedly car ried out on a boy with infantile opsoclonus-polymyoclonia syndrome, fr om 15 months to 39 months of age, the following being revealed: the I- III interpeak latency (I-III IPL) was more or less in the upper normal range until 24 months and then remained at the same level throughout the rest of the observation period, not showing physiological shorteni ng with maturation. It should be noted that the prolongation of I-III IPL continued in spite of the disappearance of the opsoclonus.