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Neurons do not divide in adulthood. There are some new neurons being born, but the rate is low. I believe that the central nervous system neuron turn over is mu
by kghose 13y ago
Neurons do not divide in adulthood. There are some new neurons being born, but the rate is low. I believe that the central nervous system neuron turn over is much lower than the cells in the rest of the body.
However, neural connectivity and the hormone levels change as we age, which probably changes our emotions and reactions and attitudes.
- tokenadult 13y agoNeurons do not divide in adulthood. The idea that there is no neurogenesis in the adult brain is described as a "myth" (a myth I certainly heard in childhood, as perhaps you have too) in many sources I just looked up after seeing your comment. Did you have a particular source in mind? Below are some that I found. (from 2000, abstract) http://www.ncbi.nlm.nih.gov/pubmed/11252770 http://www.ncbi.nlm.nih.gov/pubmed/11252770 (from 2002) http://www.jneurosci.org/content/22/3/612.full http://www.jneurosci.org/content/22/3/612.full (from 2006) http://www.ncbi.nlm.nih.gov/pubmed/17195878 http://www.ncbi.nlm.nih.gov/pubmed/17195878 (from 2013) http://www.ninds.nih.gov/disorders/brain_basics/ninds_neuron.htm http://www.ninds.nih.gov/disorders/brain_basics/ninds_neuron...
- kghose 13y agoHi, yes. There is adult neurogenesis, occurring in certain brain regions. However, this is not true for most of the central nervous system in humans. Neurons (differentiated dells) do not divide. The few new neurons that are born in adults come from special cells. I believe there is some work showing that the ventricles have these neurogenesis zones.