Axonal ramification of neurones in the nuclei raphe pallidus and obscurus projecting to the cerebellar paramedian lobule. A fluorescent double labelling study in the rabbit.

As a part of a study concerning the raphe nuclei-cerebellar cortex projection the fluorescent retrograde double labelling technique was employed to investigate the location of raphe neurones projecting to the paramedian lobule (PML) of both sides by axonal collaterals in the rabbit. Diamidino Yellow and Fast Blue injections into the right and left PML, respectively, resulted in labelling of a limited number of these neurones exclusively within the raphe pallidus and raphe obscurus nuclei.