Fig. 1.
Subregional distinctions in the VTA. Coronal sections are arranged from anterior (−4.20) to posterior (−7.10) from bregma. The division between anterior and posterior VTA is drawn between the interpeduncular nucleus and the interpeduncular fossa. PFR (red), parafasciculus retroflexus area; PBP (blue), parabrachial pigmented area; PIF (purple), parainterfascicular nucleus; PN (green), paranigral nucleus; VTT (brown), ventral tegmental tail; midline nuclei (yellow); IF, interfascicular nucleus; RLi, rostral linear nucleus; CLi, caudal linear nucleus (Color figure online)