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Sorry, Adults, No New Neurons For Your Aging Brains
National Public Radio

A major study is challenging the widely held view that adult human brains make new neurons.

The study of brain samples from 59 people of various ages found no immature neurons in anyone older than 13, scientists report online Wednesday in the journal Nature.

“In all of the adult samples we looked at, we couldn’t find any evidence of a young neuron,” says Shawn Sorrells, the study’s lead author and a senior researcher in the lab of Arturo Alvarez-Buylla at the University of California, San Francisco.

The finding challenges decades of research suggesting that new neurons continue to appear in the hippocampus, an area of the brain involved in memory and emotion. It also calls into question claims that both exercise and some anti-depressant drugs could boost the production of new neurons in the hippocampus.