Functionally, the schwann cells are similar to oligodendrocytes of the CNS. Schwann cell behaviour can be investigated in experimental nerve grafts where Schwann cells in the grafted nerve segments survive and myelinate axons regenerating from the proximal stump of the host nerve. For the term schwann cells may also exist other definitions and meanings, the meaning and definition indicated above are indicative not be used for medical and legal or special purposes. Glial cell: A supportive cell in the central nervous system. They are named after the 19th century German physiologist Theodor Schwann who first observed them. By selecting host and donor nerves, it is possible to create different combinations of axons and Schwann cells from normal and abnormal nerves. Unlike neurons, glial cells do not conduct electrical impulses. animal psychology, comparative psychology) ... se développant dans le canal auditif interne à partir des cellules de la gaine de Schwann, relativement bénigne, encapsulées et d'évolution lente. Learn more about this neuron component, explore the nodes of Ranvier, and discover why Schwann cells are crucial for neuron survival.

Bien que bénigne, cette tumeur, du fait de sa position, est plus difficilement opérable que les méningiomes, et peut entraîner la rupture du nerf acoustique (VIII). The glial cells surround neurons and provide support for and insulation between them. Schwann cells provide myelination to peripheral neurons. Schwann cells, also known as neurilemma cells or neurolemmocytes, are the cells of the peripheral nervous system that are responsible for the production of the ~ that protects the synapses of the nerves. Also called neurilemma. 1. any cell that covers the nerve fibers in the peripheral nervous system and forms the myelin sheath Schwann cells (shwahn), cells of ectodermal (neural crest) origin that compose a continuous envelope around each nerve fiber of peripheral nerves; such cells are comparable with the oligodendroglia cells of brain and spinal cord; like the latter, they may form membranous expansions that wind around axons and thus form the axon's myelin sheath. Schwann cell definition is - a myelin-secreting glial cell that spirally wraps around an axon of the peripheral nervous system to form the myelin sheath. Schwann cells begin to form the myelin sheath in mammals during fetal development and work by spiraling around the axon, sometimes with as many as 100 revolutions.

These cells are equivalent to a type of neuroglia called oligodendrocytes, which occur in the central nervous system. Schwann cell (n.). Glial cells are the most abundant cell types in the central nervous system. Types of glial cells include oligodendrocytes, astrocytes, ependymal cells, Schwann cells, microglia, and satellite cells. Schwann cell (shwän, shvän) n. Any of the cells that surround the axons of the peripheral nerves, forming the myelin sheath of myelinated nerve fibers and providing support for nonmyelinated nerve fibers. Schwann cell definition, a cell of the peripheral nervous system that wraps around a nerve fiber, jelly-roll fashion, forming the myelin sheath. They function a lot like oligodendrocytes in that they provide myelin sheaths for axons, but they exist in the peripheral nervous system (PNS) rather than the CNS. See more. A well-developed Schwann cell is shaped like a rolled-up sheet of paper, with layers of myelin in between each coil. Schwann Cells Schwann cells are named for physiologist Theodor Schwann, who discovered them. Psychology Definition of SCHWANN CELL: Any of the cells of the peripheral nervous system which wraps around a nerve fiber and covers the axons to form the myelin sheath. Lire. Theodor Schwann is one of the most reverenced scientists in history.