17 Facts About Olfactory bulb

Olfactory bulb is a neural structure of the vertebrate forebrain involved in olfaction, the sense of smell.

The bulb is divided into two distinct structures: the main olfactory bulb and the accessory olfactory bulb.

The main olfactory bulb connects to the amygdala via the piriform cortex of the primary olfactory cortex and directly projects from the main olfactory bulb to specific amygdala areas.

In most vertebrates, the olfactory bulb is the most rostral part of the brain, as seen in rats.

The olfactory bulb is supported and protected by the cribriform plate of the ethmoid bone, which in mammals separates it from the olfactory epithelium, and which is perforated by olfactory nerve axons.

The bulb is divided into two distinct structures: the main olfactory bulb and the accessory olfactory bulb.

The next level of synaptic processing in the olfactory bulb occurs in the external plexiform layer, between the glomerular layer and the mitral cell layer.

However, the olfactory bulb receives "top-down" information from such brain areas as the olfactory cortex, amygdala, neocortex, hippocampus, locus coeruleus, and substantia nigra.

The vomeronasal organ sends projections to the accessory olfactory bulb making it the second processing stage of the accessory olfactory system.

The accessory olfactory bulb receives axonal input from the vomeronasal organ, a distinct sensory epithelium from the main olfactory epithelium that detects chemical stimuli relevant for social and reproductive behaviors, but probably generic odorants.

Olfactory bulb sends olfactory information to be further processed in the amygdala, the orbitofrontal cortex and the hippocampus where it plays a role in emotion, memory and learning.

The main olfactory bulb connects to the amygdala via the piriform cortex of the primary olfactory cortex and directly projects from the main olfactory bulb to specific amygdala areas.

The orbitofrontal cortex, amygdala, hippocampus, thalamus, and olfactory bulb have many interconnections directly and indirectly through the cortices of the primary olfactory cortex.

Olfactory bulb information is sent to the primary olfactory cortex, where projections are sent to the orbitofrontal cortex.

Olfactory bulb is, along with both the subventricular zone and the subgranular zone of the dentate gyrus of the hippocampus, one of only three structures in the brain observed to undergo continuing neurogenesis in adult mammals.

The olfactory sensory neuron axons that form synapses in olfactory bulb glomeruli are capable of regeneration following regrowth of an olfactory sensory neuron residing in the olfactory epithelium.

Olfactory bulb lobe is a structure of the vertebrate forebrain involved in olfaction, or sense of smell.