This study investigated the stability over time of delays in auditory
event-related potentials (ERPs) caused by HIV-1 infection of the brain.
ERPs were recorded at two time points from 17 former parenteral drug users
(PDUs) and 8 non-PDU control subjects. There was no significant effect of
time, and peak measures for the two visits were significantly correlated
with each other. For both visits, N1 was delayed only for the seropositive
stage IV subjects, whereas N2 was delayed for both seropositive groups.
Group differences remained stable, confirming previously reported