What, if anything, is the function of adult neurogenesis in humans? Does neurogenesis even exist in our adult brains, or does it shut down during childhood?

The debate over human neurogenesis has been one of the most prominent disputes in 21st century neuroscience. Just last year, two opposing papers appeared in leading journals, one claiming firm evidence of ongoing neurogenesis in the adult human dentate gyrus, while the other study came to the opposite conclusion. The fact that adult neuro