Figure 2. Retrograde tracing confirmed dopaminergic projections from the SPF to the SPN.
A: Cholera toxin subunit B (CTB) deposit in the SPN. SOC nuclei outlines based off of Paxinos and Franklin (2001). B1: Retrogradely labeled cells in the SPF. B2: TH-positive cells in the SPF. B3: Overlay showing colocalized cells. Arrow points to an example of a retrogradely labeled cell colocalized with TH, asterisk marks a retrogradely labeled, TH-negative cell. Scale bar: A 100μm; B 40μm.