| List of regions which send connections to: RPO |
|
| Prelimbic area (PL) |
| Lateral hypothalamic area (LHA) |
| Medial preoptic area (MPO) |
| Medial preoptic nucleus (MPN) |
| Medial preoptic nucleus central part (MPNc) |
| Medial preoptic nucleus lateral part (MPNl) |
| Nucleus incertus diffuse part (NId) |
| Nucleus incertus compact part (NIc) |
| Periaqueductal gray (PAG) |
| Precommissural nucleus (PRC) |
