Vomeronasal Olfactory System. Immediately caudal to the incisor teeth is a papilla onto which open two nasopalatine canals. These canals allow slow passage of odors from the mouth to the vomeronasal organ located within the hard palate. The vomeronasal organ (organ of Jacobson) is lined with olfactory cells, and has central pathways different from those of olfactory epithelium. Impulses first travel to the accessory olfactory bulb and then to areas of the hypothalamus associated with sexual behavior, feeding behavior, and, possibly, social interactions.