alexa Dynamics of hippocampal neurogenesis in adult humans.
Engineering

Engineering

International Journal of Swarm Intelligence and Evolutionary Computation

Author(s): Spalding KL, Bergmann O, Alkass K, Bernard S, Salehpour M,

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Abstract Adult-born hippocampal neurons are important for cognitive plasticity in rodents. There is evidence for hippocampal neurogenesis in adult humans, although whether its extent is sufficient to have functional significance has been questioned. We have assessed the generation of hippocampal cells in humans by measuring the concentration of nuclear-bomb-test-derived ¹⁴C in genomic DNA, and we present an integrated model of the cell turnover dynamics. We found that a large subpopulation of hippocampal neurons constituting one-third of the neurons is subject to exchange. In adult humans, 700 new neurons are added in each hippocampus per day, corresponding to an annual turnover of 1.75\% of the neurons within the renewing fraction, with a modest decline during aging. We conclude that neurons are generated throughout adulthood and that the rates are comparable in middle-aged humans and mice, suggesting that adult hippocampal neurogenesis may contribute to human brain function. Copyright © 2013 Elsevier Inc. All rights reserved.
This article was published in Cell and referenced in International Journal of Swarm Intelligence and Evolutionary Computation

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