Modulation of Nur77 mRNA levels in striosome and matrix compartments of the anterior (A) and posterior (B) caudate nucleus and putamen in L-Dopa-treated MPTP monkeys. Histogram bars represent means ± SEM in controls, MPTP, MPTP + L-Dopa and MPTP + Dopa + DHA-treated animals (N=4–5 per group, * p < 0.05 and ** p < 0.01 vs control, # p < 0.05 vs MPTP, & p < 0.05 vs MPTP + L-Dopa). For each animal, 3 to 5 striosome and matrix areas were used to average Nur77 mRNA levels in these respective compartments.