nerve center, nerve centre, centre, center - a cluster of nerve cells governing a specific bodily process; "in most people the speech center is in the left hemisphere"

piriform area, piriform lobe, pyriform area, pyriform lobe - pear-shaped neural structure on either side of the brain in the rhinencephalon

olfactory bulb - one of two enlargements at the terminus of the olfactory nerve at the base of the brain just above the nasal cavities