Adult-born dentate gyrus neuron number

adult neurogenesis increases adult-born dentate gyrus neuron number in rats (670,000 neurons added; 30% of the total population).

“We estimate that over this timeframe 670,000 adult-born neurons are added (30% of the total population).”

AnimalsNeuron addition estimated using proliferating Ki67+ cells as a proxydentate gyrus

The Dentate Gyrus Grows Throughout Life Despite Turnover of Developmentally-Born Neurons

Hippocampus·20 Apr 2026