| 5-HT | serotonin |
| AHC | agglomerative hierarchical clustering |
| C | control |
| W | winners |
| CAergic | catecholaminergic |
| FPKM | fragments per kilobase of transcript per million mapped reads |
| GABA | γ-aminobutyric acid |
| MRNs | midbrain raphe nuclei |
| MSNs | medium spiny neurons |
| NAcc | nucleus accumbens |
| PCA | principal component analysis |
| PFC | prefrontal cortex |
| STR | dorsal striatum |
| VTA | ventral tegmental area |