Figure 1.

Experimental design of the dual probe in vivo microdialysis approach. The location of the cannula in the striatum was Bregma A +0.5, L 3.1, V −5 and of the two microdialysis probes, one in the globus pallidus (2 mm probe) and the other in the SN (1 mm probe), were Bregma A −1.3, L 3.1, V −8.0 and A −5.5, L 2.2, V −9.5, respectively. The coordinates used are based on the atlas of Paxinos and Watson (17).