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Micrograph showing gliosis in the cerebellum. Reactive astrocytes on the left display severe proliferation and domain overlap. Reactive astrogliosis is the most common form of gliosis and involves the proliferation of astrocytes, a type of glial cell responsible for maintaining extracellular ion and neurotransmitter concentrations, modulating synapse function, and forming the blood–brain ...
Cell replacement strategies are now intensely studied as a possible therapeutic intervention of glial associated neurodegenerative disorders and glial tumors. Similar to any novel strategy, however, set-backs and liabilities accompany the promises this technique withholds.
Rosenthal fibers. H&E staining showing these elongated eosinophilic structures in a case of pilocytic astrocytoma.Magnification 400x. A Rosenthal fiber is a thick, elongated, worm-like or "corkscrew" eosinophilic (pink) bundle that is found on staining of brain tissue in the presence of long-standing gliosis, occasional tumors, and some metabolic disorders.
Although glial cells and neurons were probably first observed at the same time in the early 19th century, unlike neurons whose morphological and physiological properties were directly observable for the first investigators of the nervous system, glial cells had been considered to be merely "glue" that held neurons together until the mid-20th ...
A glial scar formation is a reactive cellular process involving astrogliosis that occurs after injury to the central nervous system.As with scarring in other organs and tissues, the glial scar is the body's mechanism to protect and begin the healing process in the nervous system.
Gemistocytes are glial cells that are characterized by billowing, eosinophilic cytoplasm and a peripherally positioned, flattened nucleus. Gemistocytes most often appear during acute injury; and eventually, shrink in size. [1] They are usually present in anoxic-ischemic brains, which occurs when there is a complete lack of blood flow to the brain.
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