The olfactory bulb is a brain structure that is part of the limbic system. It is located at the bottom part of the frontal lobe. It receives input from the olfactory receptors (sense of smell) located in the nose. This information is then relayed to the olfactory nerve where it feeds into the amygdala and other brain structures. The olfactory bulb is one of two brain structures that continue neurogenesis into adulthood. The other is the hippocampus. Smell is the only one of our senses that is not first processed by the thalamus, this probably accounts for the strong emotional component of smells.