Photomicrographs of selected rat nigral sections, immunostained for TH. Nigrostriatal cell bodies and dendrites appear dark brown/brown in sections. Sections A, C, E and are contralateral (untreated) nigra for comparison with ipsilateral (treated) nigra B, D, F. Key: B – LPS + vehicle, D – LPS + EX-4 0.1 μg/kg, F – LPS + EX-4 0.5 μg/kg. Bar is 100 μm. Sections are representative of 6 rats for each treatment.