myelin sheath


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myelin sheath

n.
The insulating envelope of myelin that surrounds the core of a nerve fiber or axon and facilitates the transmission of nerve impulses. In the peripheral nervous system, the sheath is formed from the membranes of Schwann cells, and in the central nervous system it is formed from oligodendrocytes. Also called medullary sheath.

my′elin sheath`


n.
a discontinuous wrapping of myelin around certain nerve axons, serving to speed nerve impulses to muscles and other effectors.
[1895–1900]
ThesaurusAntonymsRelated WordsSynonymsLegend:
Noun1.myelin sheath - a layer of myelin encasing (and insulating) the axons of medullated nerve fibersmyelin sheath - a layer of myelin encasing (and insulating) the axons of medullated nerve fibers
sheath, case - an enveloping structure or covering enclosing an animal or plant organ or part
axolemma - outer membrane covering an axon
medullated nerve fiber, myelinated nerve fiber - a nerve fiber encased in a sheath of myelin
nodes of Ranvier, Ranvier's nodes - small gaps in the myelin sheath of medullated axons
oligodendria, oligodendroglia - tissue consisting of glial cells with sheetlike processes that form the myelin sheath of nerve fibers
medulla, myelin, myeline - a white fatty substance that forms a medullary sheath around the axis cylinder of some nerve fibers
Translations
myelinová pochva
References in periodicals archive ?
Finding about the potential reversal came via the discovery that the oligodendrocytes that produce the myelin sheath are still functional after demylination, and may be induced to remyelinate the axons once the disease process is under control.
Similar to multiple sclerosis (MS), TM destroys the myelin sheath surrounding nerve fibers in the spinal cord, compromising muscle control and affecting sensation.
CIDP is a rare autoimmune disorder that affects the peripheral nerves (those outside the brain and spinal cord), the myelin sheath, the protective covering of the nerves, is damaged.
The artificial membranes used in the study are made of packed layers of lipids that are similar to those found in the myelin sheath that covers axons to help electrical impulses move quickly and efficiently.
Her condition, primary progressive MS, caused a rapid deterioration of the myelin sheath and led to her condition worsening very quickly.
These involve the previously neglected ultrastructure of CNS myelin with cytosolic (20-300 nanometer wide) channels within the myelin sheath.
Its cells are covered in a protective layer of fatty protein called the myelin sheath, a bit like the insulation on an electrical cable.
All of these ingredients are neuroprotective and help maintain the myelin sheath covering and insulating the layer of nerve cells.
Stem cells can become any type of cell, such as muscle, brain tissue or, in this case, the myelin sheath - a fatty lining around the nerves in the brain that protects and insulates them.
Without that cover, known as the myelin sheath, nerve cells can't transmit information as well, leading to memory and other problems.
Such an increase was principally due to the increase in the myelin sheath (19.
White matter gets its name from the white, fatty myelin sheath that surrounds the axons and speeds the flow of electrical signals from cell to cell.