Distribution of FG- TH- and GAD-67-labeled cells in the VTA.

<p>Schematic representation of the location of cells labeled for FG alone (black squares), FG+TH (blue circles), FG+GAD-67 (green triangles) and FG+TH+GAD-67-labeled cells (red stars) in the [A] rostral (∼bregma −5.14 mm), [B] middle (∼bregma −5.67 mm), and [C] caudal (∼bregma −6.30 mm) levels of the VTA <a href="http://www.plosone.org/article/info:doi/10.1371/journal.pone.0020508#pone.0020508-Paxinos1" target="_blank">[17]</a>. Insets display schematic diagrams depicting the location of VTA (shaded) relative to surrounding brain areas (see <a href="http://www.plosone.org/article/info:doi/10.1371/journal.pone.0020508#pone-0020508-g005" target="_blank">Fig. 5</a> for abbreviations) <a href="http://www.plosone.org/article/info:doi/10.1371/journal.pone.0020508#pone.0020508-Paxinos1" target="_blank">[17]</a>. Data represent the number and distribution of cells counted in one rostral, middle or caudal section from a animal injected with FG in the NAc shell.