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Glial cells known as astrocytes enlarge and proliferate to form a scar and produce inhibitory molecules that inhibit regrowth of a damaged or severed axon. In the peripheral nervous system (PNS), glial cells known as Schwann cells (or also as neuri-lemmocytes) promote repair. After axonal injury, Schwann cells regress to an earlier ...
During periods in which glial cell formation is discouraged, neural stem cells have the option to remain pluripotent or switch pathway lineages and begin forming neurons during neurogenesis. If neuron development is instructed, neurogenic factors, i.e. BMPs , [ 8 ] are present to induce expression of proneural transcription factors like ...
The two main types of cells in the brain are neurons, also known as nerve cells, and glial cells, also known as neuroglia. [1] There are many types of neuron, and several types of glial cell. Neurons are the excitable cells of the brain that function by communicating with other neurons and interneurons (via synapses ), in neural circuits and ...
Schwann cells or neurolemmocytes (named after German physiologist Theodor Schwann) are the principal glia of the peripheral nervous system (PNS). Glial cells function to support neurons and in the PNS, also include satellite cells, olfactory ensheathing cells, enteric glia and glia that reside at sensory nerve endings, such as the Pacinian corpuscle.
These cells are one of the major neural-crest-derived cell lineages, found throughout the gastrointestinal tract. The enteric glial cells play a variety of roles, such as modulating nociception (pain sensation), exerting immune functions , and coordingating gastrointestinal motility .
Gliotransmitters are chemicals released from glial cells that facilitate neuronal communication between neurons and other glial cells. They are usually induced from Ca 2+ signaling, [1] although recent research has questioned the role of Ca 2+ in gliotransmitters and may require a revision of the relevance of gliotransmitters in neuronal signalling in general.
Satellite glial cells, formerly called amphicytes, [1] are glial cells that cover the surface of neuron cell bodies in ganglia of the peripheral nervous system. Thus, they are found in sensory , sympathetic , and parasympathetic ganglia .
Radial glial cells, or radial glial progenitor cells (RGPs), are bipolar-shaped progenitor cells that are responsible for producing all of the neurons in the cerebral cortex. RGPs also produce certain lineages of glia , including astrocytes and oligodendrocytes .
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