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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 ...
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 ...
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.
Nervous tissue, also called neural tissue, is the main tissue component of the nervous system.The nervous system regulates and controls body functions and activity. It consists of two parts: the central nervous system (CNS) comprising the brain and spinal cord, and the peripheral nervous system (PNS) comprising the branching peripheral nerves.
Oligodendrocytes are a type of glial cell, non-neuronal cells in the central nervous system.They arise during development from oligodendrocyte precursor cells (OPCs), [8] which can be identified by their expression of a number of antigens, including the ganglioside GD3, [9] [10] [11] the NG2 chondroitin sulfate proteoglycan, and the platelet-derived growth factor-alpha receptor subunit (PDGF ...
The enteric glial cells play a variety of roles, such as modulating nociception (pain sensation), exerting immune functions, and coordingating gastrointestinal motility. [ 1 ] [ 2 ] [ 3 ] They are the largest glial population outside the brain, and considered "a key node of the gut-brain axis ".
A glioblast is a type of cell located in the embryonic neuroectoderm that has the ability to differentiate into several different types of neuroglia through asymmetric cell division. [1] It comes from a precursor (spongioblast). However, the latter may also differentiate into an ependymoblast.
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 ...
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