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The Accessory Olfactory Bulbs

The accessory olfactory bulbs (AOBs), to which VN nerves normally project in mammals, have not been clearly identified in humans, raising additional questions about human VNO function. The central target of VNO input in mammals, the amygdala, is present in humans and does receive chemosensory input. It probably shares some functions with the amygdala in other mammals but whether these include the analysis of purely vomeronasal input is not yet clear.