From Neuroskeptic at Discover:
In a new paper that could prove explosive, Australian neuropathologists C. V. Dennis and colleagues report that they found very little evidence for adult neurogenesis in humans.
… Dennis et al. don’t quite rule out all neurogenesis in adults. However, the authors say that if human adult neurogenesis takes place, it does so at an extremely low rate: relatively speaking, it’s about 10 times lower than the rate seen in adult rodents.More.
In that case, old neurons must be learning new functions because rehabilitation happens all the time.
See also: Birds have more neurons than primates do. It’s unclear how neurons relate to intelligence, exactly.
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