Prepulse inhibition (PPI) performance in sham and 6-OHDA-treated
animals. Sham-lesioned animals demonstrated a normal inhibition of
the startle response with increased prepulse intensity (i.e., increased
% prepulse inhibition). Two-way ANOVA revealed significant main effects
of treatment condition and prepulse intensity. Bonferroni post hoc
analyses for repeated measures showed that vehicle-6-OHDA animals
showed impaired PPI at all prepulse intensities compared with sham
controls (*p < 0.05). Pretreatment with estradiol,
AC-131, AC-186, AC-623, or AC-957 prevented the 6-OHDA-induced deficits
in PPI (+p < 0.05 vs vehicle-treated
6-OHDA lesioned animals). Data were analyzed using repeated measures
two-way ANOVA followed by Bonferonni’s multiple comparison
post hoc analyses.