Myelin (1181 bytes)
1: ...[glia|glial cells]]: [[Schwann cell]]s supply the myelin for [[PNS|peripheral]] neurons while [[oligodendr...
3: ...rovides a track along which regrowth can occur. Unmyelinated fibers do not regenerate.
5: ...isoning may lead to demyelination. When an axon's myelin degrades due to these diseases, conduction can be...
7: [[de:Myelin]] [[fr:Myéline]]

Neurolemma (443 bytes)
1: ...ous system|peripheral]] [[axon|nerve fiber]]. The myelin is contributed by [[Schwann cell]]s and the layer...

Schwann cell (1149 bytes)
1: ... the [[peripheral nervous system]], forming the [[myelin sheath]]. The nervous system depends crucially on...
3: ...tly [[cell membrane|membrane]] material, form the myelin sheath while the outermost layer of nucleated [[c...

Node of Ranvier (597 bytes)
1: ...agating smoothly, as they do in axons that lack a myelin sheath. This is known as [[saltatory conduction]]...

Saltatory conduction (883 bytes)
1: ...ich [[action potential]]s are transmitted along [[myelin]]ated [[axon|nerve fiber]]s.
3: ...hreshold for action potential initiation. Thus in myelinated axons, action potentials do not propagate as ...

Progressive multifocal leukencephalopathy (946 bytes)
1: ...n|inflammatory]] disorder that leads to loss of [[myelin]] in multiple areas within the [[white matter]] o...
7: ... resident in most adults, but it triggers loss of myelin in those whose immune function is deficient. It o...

Neurinoma (273 bytes)
1: ...but sometimes [[cancer]]ous, which forms on the [[myelin]]ous sheath of a [[nerve]]. Neurinomas commonly a...

P0 (313 bytes)
3: * [[P0 protein]], a [[protein]] of the [[myelin]]

Progressive multifocal leukoencephalopathy (1972 bytes)
3: ...he cells that produce myelin (unlike MS, in which myelin itself is attacked but can be replaced), it progr...

Wallerian degeneration (320 bytes)
3: ...eration is distal degeneration of axons and their myelin sheaths secondary to injury to the neuron cell bo...

Motor end plate (381 bytes)
1: ...r]] ([[efferent]]) [[nerve]] [[axon]] loses its [[myelin sheath]] and branches into multiple endings, whic...

Pelizaeus-Merzbacher disease (1987 bytes)
1: ...q22 [[gene]] on the X-chromosome that codes for a myelin [[protein]] called [[proteolipid protein]] or PLP...

Myelitis (499 bytes)
3: To simplify, [[myelin]] sheathes act as insulators to the electrical im...

Demyelinating disease (709 bytes)
1: ...isease]] of the [[nervous system]] in which the [[myelin]] sheath of [[neuron]]s is damaged. This impairs...
3: ...ect of the disease, rather than its cause; some demyelinating diseases are caused by [[infection|infectiou...
5: Demyelinating diseases include [[multiple sclerosis]], [[t...

Neural pathway (3638 bytes)
1: ...er, usually consisting of bundles of elongated, [[myelin]] insultated [[neuron]]s, known collectively as [...
11: ... the axons lack [[myelin]] sheiths (i.e., are ''unmyelinated''), then the pathway will appear a darker bei...

Adrenoleukodystrophy (2134 bytes)
1: ...isorders such as [[multiple sclerosis]], in which myelin is formed normally, but is lost by immunologic dy...

Wolfram syndrome (746 bytes)
1: ...th a malfunction of the [[mitochondria]] and of [[myelin]]antion, the latter in effect similar to [[multip...

Central pontine myelinolysis (756 bytes)
1: ...urologic disease caused by severe damage of the [[myelin sheath]] of [[neuron|nerve cells]] in the [[brain...

Canavan disease (4213 bytes)
1: ...hy|leukodystrophies]] that affect growth of the [[myelin]] sheath of the [[nerve fiber]]s in the brain.
7: ... sheath of the [[nerve fiber]]s in the brain. The myelin sheath is the [[fat]]ty covering surrounding nerv...
18: ...hown marked improvements, including the growth of myelin with decreased levels of the n-acetyl-aspartate t...

Tractography (3742 bytes)
11: ...ut in white matter the principal barrier is the [[myelin]] sheath of [[axons]]. Bundles of axons provide ...
13: ...f high mature axonal order. Conditions where the myelin or the structure of the axon are disrupted, such ...

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