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 ?
Myelin-related diseases, such as multiple sclerosis, are those where the myelin sheath surrounding nerves is damaged leading to deficient nerve transmission that may affect multiple functions, including sensation, cognition and movement, among others.
This early stage research showed that by using these skin-related stem cells, researchers were able to restore myelin sheath formation in mice.
The axonal diameter and the thickness of the myelin sheath were measured quantitatively by examining a group of randomly selected 100 nerve fibrils.
The nerves in our body communicate via nerve fibers and these fibers are protected by a layer called myelin sheath. People diagnosed with MS have immune systems that attack this protective layer, causing the disruption of nerve signals.
In a second study, a team from the National Institutes of Health in Bethesda, Md., reports that in mice and rats, brain cells called astrocytes can control how fast nerve cells transmit signals by regulating the thickness of the myelin sheath that insulates nerve fibers.
MOG is found on the outer surface of the myelin sheath and in the oligodendrocyte plasma membrane, and is an important surface marker for oligodendrocyte maturation, although it constitutes only 0.05% of the myelin (2).
The erosion of the myelin sheath interrupts the transmission of signals along nerves, which causes the symptoms of MS, such as vision problems, muscle weakness, and difficulty with coordination and balance.
Both of these methods produce nerve injury and result in the degeneration of nerve fibres form the distal to the lesion along with its myelin sheath, also known as "Wallerin degeneration." Claim Sample Report For FREE- https://www.factmr.com/connectus/sample?flag=S&rep_id=2283 In clinical practice, neuro ablation devices lead to nerve regeneration after ablation based on the thickness of the tactile sense, motor, proprioception, temperature, pain and sympathetic tone.
[ClickPress, Mon Oct 08 2018] Adrenoleukodystrophy is also known as Adrenomyeloneuropathy or Schilder-Addison Complex, it is a hereditary condition that damages the myelin sheath (membrane surrounding nerve cells in your brain) and disrupts the breakdown process of long-chain fatty acids (VLCFA).
When administered in high doses over time, it acts as a nutrient that supports the production of the myelin sheath. That's the layer around nerves that allows for easy transmission of electrical impulses provided that there is enough cellular energy.
Multiple Sclerosis is an autoimmune disease that attacks and destroys a structure known as the "myelin sheath", whose integrity is indispensable for the brain and spinal cord to function properly.
In contrast, in CIDP, the nerve damage occurs because the body's immune system erroneously attacks the myelin sheath, a fatty structure that covers and protects nerves as well as the axons.