Neurogenesis
Generation of cells within the nervous system / From Wikipedia, the free encyclopedia
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Neurogenesis is the process by which nervous system cells, the neurons, are produced by neural stem cells (NSCs).[1] This occurs in all species of animals except the porifera (sponges) and placozoans.[2] Types of NSCs include neuroepithelial cells (NECs), radial glial cells (RGCs), basal progenitors (BPs), intermediate neuronal precursors (INPs), subventricular zone astrocytes, and subgranular zone radial astrocytes, among others.[2]
Neurogenesis | |
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![]() A neurosphere of neural stem cells in rat embryo spreads out into a single layer of cells. A) Neurosphere of subventricular zone cells after two days in culture. B) Shows the neurosphere at four days in culture and cells migrating away. C) Cells at the periphery of the neurosphere mostly having extending processes. | |
Identifiers | |
MeSH | D055495 |
Anatomical terminology |
Neurogenesis is most active during embryonic development and is responsible for producing all the various types of neurons of the organism, but it continues throughout adult life in a variety of organisms.[2] Once born, neurons do not divide (see mitosis), and many will live the lifespan of the animal, except under extraordinary and usually pathogenic circumstances.[3]