Glomerulus (IMAGE)
Caption
Shown is an image of an olfactory glomerulus, the functional unit of odor processing within the olfactory bulb of the brain. The blue fibers represent the sensory projections from the nose to an individual oval-shaped glomerulus, which is about 50 microns in diameter. It is one of approximately 1,000 different specific glomeruli in each olfactory bulb. Each glomerulus is specific for a different odorant receptor. Dias and Ressler showed that pairing an odor with a shock leads to an increased number of odor-specific cells in the nose and size of the odor-specific glomerulus in the adult mouse, which then persists for at least two generations through inheritance.
Credit
Kerry Ressler
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