Accessory olfactory bulb

The entorhinal cortex receives a substantial input from the MOB (Broadwell, 1975 De Olmos et al. 1978 Kosel et al. 1981 Shipley and Adamek, 1984). In turn, the medial and lateral entorhinal cortex projects to the dentate gyrus and CA fields of the hippocampus (Hjorth-Simonsen, 1972 Steward, 1976). Recent studies show that MOB projections to entorhinal cortex make direct contact with stellate cells located in layer II that in turn project via the perforant path to the hippocampus (Schwerdtfeger et al. 

In addition, piriform cortex has direct connections to the entorhinal cortex. Because the hippocampus is important in memory function, these olfactory-entorhinal-hippocampal circuits may be important for establishment or recall olfactory memories formed or associated with other events. 

The accessory olfactory bulb (AOB) has some similar cytoarchitectural features to the MOB, but is much smaller (Fig. 20, 21). The AOB is located at the caudal-dorsal end of MOB. The vomeronasal nerve transmits information from the vomeronasal organ (VNO) to the glomeruli of AOB. The AOB does not receive projections from the main 

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In its central projections the vomeronasal pathway, distinguished by a unique lectin-affinity, ascends to an accessory olfactory bulb, while dorsal and ventral pathways supply the dorsal and ventral regions of the main olfactory bulb (Saito and Taniguchi, 2000). The AOS (but not the MOS) of salamanders displays considerable diversity in the... 

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