bulbonuclear

bul·bo·nu·cle·ar

(bŭl-bō-nū'klē-ar),
Relating to the nuclei in the medulla oblongata.

bulbonuclear

(bŭl″bō-nū′klē-ăr) [″ + nucleus, kernel]
Pert. to the nuclei in the medulla oblongata.