Drawings of BDA-labeled, cMRF reticuloraphe axon terminals and RIP neurons. Inset a shows the brain section from which the detailed drawings of RIP were made. Inset b in the center is the outline of RIP, showing numerous labeled axon terminal arbors. Inset c shows the BDA injection site in the cMRF. A–G, Counterstained RIP cell bodies and BDA-labeled, cMRF reticuloraphe axon terminals. Close associations between them are indicated by arrowheads. Long arrows point to their locations in RIP. nPC, Nucleus of the posterior commissure; Vin, sixth nerve.