Theolfactory bulb is a part of thevertebrateforebrain. It works inolfaction, or the sense of smell.
The olfactory bulb has one source of sensory input (axons from olfactory receptor neurons, and one output (mitral cell axons). It is thought that it functions as afilter. However, the olfactory bulb also gets "top-down" information from brain areas like theamygdala,neocortex,hippocampus,locus coeruleus, andsubstantia nigra.[1][2]
Its range of functions probably include: