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Gliogenesis: Historical Perspectives, 1839 - 1985 (Paperback, 2009 ed.)
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Gliogenesis: Historical Perspectives, 1839 - 1985 (Paperback, 2009 ed.)
Series: Advances in Anatomy, Embryology and Cell Biology, 202
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This historical review of gliogenesis begins with the introduction
of the cell doctrine by Theodor Schwann in 1839. A number of
investigators then showed that tissues and organs were made up of
cells. However, when Virchow examined the CNS, what separated nerve
cells from each other and from blood vessels appeared to be an
unstructured ground substance. He called this binding material
"glia" (for glue) and thought it was related to connective tissue.
Deiters, a pupil of Virchow, discovered that this ground substance
was composed of cells, which he described and illustrated.
Subsequent improvements in microscope lenses and the introduction
of metallic impregnation methods finally permitted the
visualization of glial cells and their processes in toto. Light
microscopic studies led to the discovery of different types of
glial cellsastroglia, oligodendroglia, microglia, ependymal cells
in the CNS, and Schwann cells in the PNS. Subsequent observations
characterized the origin and development of each type of glial
cell. In the 1950s a new era began with the introduction of
electron microscopy, tissue culture, and immunocytochemistry. Other
techniques and models were developed and exploited in order to
better understand the origins of glia and how they multiply,
migrate, and differentiate. In this review, morphology is
emphasized. Findings related to cytodifferentiation and the
cellular interactions, functions, and regulation of developing glia
have also been included.
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