What is olfactory bulb neurons?

The olfactory bulb (Latin: bulbus olfactorius) is a neural structure of the vertebrate forebrain involved in olfaction, the sense of smell. It sends olfactory information to be further processed in the amygdala, the orbitofrontal cortex (OFC) and the hippocampus where it plays a role in emotion, memory and learning.

How many neurons are in the olfactory bulb?

Humans have between 10 and 20 million olfactory receptor neurons. In vertebrates, ORNs are bipolar neurons with dendrites facing the external surface of the cribriform plate with axons that pass through the cribriform foramina with terminal end at olfactory bulbs.

Do olfactory receptor neurons regenerate?

The olfactory system is one of a few areas in the nervous system which is capable of regeneration throughout the life. Olfactory sensory neurons reside in the nasal cavity are continuously replenished with new neurons arising from stem cells.

Which cells are present in olfactory bulb?

The olfactory bulb is an evaginated cortical structure that contains two main types of neurons, projection neurons (mitral/tufted cells) and interneurons.

Are olfactory neurons bipolar?

The most important of these is the olfactory receptor neuron, a bipolar cell that gives rise to a small-diameter, unmyelinated axon at its basal surface that transmits olfactory information centrally.

Is the olfactory bulb part of the brain?

The olfactory bulb is the region in the brain receiving input from the olfactory neurons in the nasal olfactory epithelium. It is organized in glomeruli (one per smell) and innervates the dendrites of mitral cells that project to other forbrain regions including the olfactory cortex.

What is unique about olfactory neurons?

Olfactory sensory neurons (OSNs) are receptor neurons for odorant detection. There are many characteristics unique to OSNs including the genes they express, odorant detection specificity, regulation of neuronal differentiation and physiological properties.