No new smell cells

No new smell cells

Unlike other mammals, humans don’t make new olfactory neurons, a study suggests

By Tina Hesman Saey, 15:38 PM May 23, 2012

People may be born with all the smell-sensing brain cells they will ever have, a new study concludes.

That makes human brains different from those of rodents, nonhuman primates and other mammals, which constantly make new nerve cells, or neurons, in the odor-processing olfactory bulb. Humans don’t rely on the sense of smell as much as other animals do, so maybe it isn’t surprising that people don’t make new odor-sensing cells, says study author Jonas Frisén, a neuroscientist at the Karolins...

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