| 5–HT | serotonin |
| 5–HT+ | 5–HT-positive cells |
| ARC | arcuate nucleus of the hypothalamus |
| B6 | dorsal raphe nucleus |
| B8 | median raphe nucleus |
| c-Fos+ | c-Fos-positive nuclei |
| DG | dentate gyrus |
| EPM | elevated plus maze |
| MWM | Morris water maze |
| M2 | secondary motor cortex |
| NT | novelty test |
| PBS | phosphate-buffered saline |
| RMg | raphe magnus |
| RMg-Sham | control group of rats with the naïve stimulation of the raphe magnus |
| RMg-ST | group of rats with the electrical stimulation of the raphe magnus |