main olfactory bulb
Acronym:
MOB
The term main olfactory bulb (MOB) refers, in the human ( Carpenter-1983 ) and the macaque ( Price-2004 ), to a very small white oval structure located in the cleft between the ventral surface of the frontal lobe (FLB) and the floor of the cranial cavity. In the rat ( Paxinos-2008b ) and mouse ( Franklin-2008 ), it is enormously larger compared to the rest of the brain; in the rodent, it extends almost a quarter of the length of the brain (BRN) ( Swanson-2004 ).
In all species, it is connected rostrally with the olfactory nerve (1n). Caudally, in the rat ( Swanson-2004 ) and mouse ( Franklin-2008 ), it connects directly through the olfactory tract (oltr) to the olfactory cortex (OTX) and through the olfactory limb of the anterior commissure (aca) to the MOB in the opposite cerebral hemisphere (CHS). In primates, it connects to those structures through the olfactory peduncle (olf), the main component of which is the oltr.
The MOB is a layered structure that contains cell bodies of the second-order neurons in the olfactory system (OSY). They include the mitral cell ensemble of the main olfactory bulb (MCEm) and the tufted cell ensemble (TCE).
Functionally, the MOB plays a roll in oderant feature detection. It is a key structure in the system that mediates the conscious sense of smell ( Buck-2013 ). Final 19 Jan 2025.
Also known as: olfactory bulb, Bulbus olfactoriusNeuroNames ID : 279
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