Fig. 5: Fiber implantation causes strong local cell displacement in the VTA.

Depicted are YFP (coexpressed with Channelrhodopsin) fluorescent microscopy images of the VTA, overlaid on corresponding transmission microscopy images of the same focal plane. All slices are seen in neurological orientation (the right of the image corresponds to the right of the animal). A higher magnification of b is depicted in c. White bars indicate a scale of 500 µm, and slices are shown in neurological orientation. a 3.05 mm caudal of Bregma. b 3.5 mm caudal of Bregma. c 3.5 mm caudal of Bregma.