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Myelin is dielectric (electrically insulating) material that forms a layer, the myelin sheath. Usually, myelin surrounds only the axon of a neuron. It is essential for proper functioning of the nervous system. Myelin is an outgrowth glial cell: Schwann cells supply the myelin for peripheral neurons, whereas oligodendrocytes supply it to those of the central nervous system. Myelin is considered a defining characteristic of the (gnathostome) vertebrates, but it has also arisen by parallel evolution in some invertebrates. Myelin was discovered in 1854 by Rudolf Virchow .

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Blogs for Myelin

Myelin's blog - Vox

This is Myelin's blog on Vox. Vox is a free personal blogging service where people share thoughts, photos, videos & more with friends & family.myelin.vox.com/

myelin's blog

myelin's blog. Just another WordPress.com weblog. This is a test. December 5, 2005 by myelin ... Valid XHTML. XFN. WordPress. Blog at WordPress.com. Entries ...myelin.wordpress.com/

Myelin — Blogs, Pictures, and more on WordPress

Enzymes May Be Key to Myelin Repair — 3 comments ... success: 10,000 hours of practice and plenty of myelin! — 5 comments ... Could Myelin Really Be Repaired? ...en.wordpress.com/tag/myelin/

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myelin. bzero. topic exchange. python community server. new zealand coffee. pycs ... Everyone loves to blog about how to achieve high availability with various ...www.myelin.co.nz/post/

Advogato: Personal info for myelin

Recent blog entries by myelin. Syndication: RSS 2.0. 21 May 2002 " ... Keep up with the latest Advogato features by reading the Advogato status blog. ...www.advogato.org/person/myelin/

Wikipedia About Myelin

Myelin is dielectric (electrically insulating) material that forms a layer, the myelin sheath. Usually, myelin surrounds only the axon of a neuron. It is essential for proper functioning of the nervous system. Myelin is an outgrowth glial cell: Schwann cells supply the myelin for peripheral neurons, whereas oligodendrocytes supply it to those of the central nervous system. Myelin is considered a defining characteristic of the (gnathostome) vertebrates, but it has also arisen by parallel evolution in some invertebrates. Myelin was discovered in 1854 by Rudolf Virchow .

Composition of myelin

Myelin made by different cell types varies in chemical composition and configuration, but performs the same insulating function. Myelinated axons are white in appearance, hence the "white matter" of the brain.

Myelin is composed of about 80% lipid and about 20% protein. Some of the proteins that make up myelin are Myelin basic protein (MBP), Myelin oligodendrocyte glycoprotein (MOG), and Proteolipid protein (PLP). Myelin is made up primarily of a glycolipid called galactocerebroside. The intertwining of the hydrocarbon chains of sphingomyelin serve to strengthen the myelin sheath.

Function of myelin layer

Myelinated%20neuron.jpg

The main purpose of a myelin layer (or sheath) is an increase in the speed at which impulses propagate along the myelinated fiber. Along unmyelinated fibers, impulses move continuously as waves, but, in myelinated fibers, they hop or "propagate by saltation." Myelin increases electrical resistance across the cell membrane by a factor of 5,000 and decreases capacitance by a factor of 50.Fact: date=April 2007 Thus, myelination helps prevent the electrical current from leaving the axon.

When a peripheral fiber is severed, the myelin sheath provides a track along which regrowth can occur. Unmyelinated fibers and myelinated axons of the mammalian central nervous system do not regenerate.

Demyelination and Dysmyelination

See: Demyelinating disease Demyelination is the loss of the myelin sheath insulating the nerves, and is the hallmark of some neurodegenerative autoimmune diseases, including multiple sclerosis, acute disseminated encephalomyelitis, transverse myelitis, Alexander's disease, chronic inflammatory demyelinating polyneuropathy, Guillain-Barré Syndrome and central pontine myelinosis. Sufferers of pernicious anaemia can also suffer nerve damage if the condition is not diagnosed quickly. Sub-acute combined degeneration of the spinal cord secondary to pernicious anaemia can lead to anything from slight peripheral nerve damage to severe damage to the central nervous system affecting speech, balance and cognitive awareness. When myelin degrades, conduction of signals along the nerve can be impaired or lost and the nerve eventually withers.

Search results for Myelin

Myelin : National MS Society

Myelin is a substance rich in protein and lipids (fatty substances) that forms ... Myelin prevents the current from leaking out of the nerve at inappropriate ...www.nationalmssociety.org/about-multiple-sclerosis/what-is-m...

Glossary - The Myelin Project

The Myelin Project - Glossary - En Español A Adrenoleukodystrophy (ALD): A rapidly progressive X-linked genetic disorder marked by the accumulation of saturated ...www.myelin.org/en/cms/?65

What is Myelin?

Brief and Straightforward Guide: What is Myelin? ... As part of the nervous system, myelin lines nerve fibers to protect and insulate ...www.wisegeek.com/what-is-myelin.htm

Myelin Repair Foundation - Multiple Sclerosis Research :: About Us ...

Answers to frequently asked questions about the Myelin Repair Foundation and our research model, as well as general information about multiple sclerosis and myelin.www.myelinrepair.org/about/frequently_asked_questions.shtml

myelin - multiple sclerosis encyclopaedia

Multiple Sclerosis Encyclopaedia - myelin ... Myelin considerably increases the speed that nerve signals (impulses) move down the axons. ...www.mult-sclerosis.org/myelin.html

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News about Myelin

Technologies help more enjoy movies

Traverse City Record-EagleWith assistive technology coming soon to the State Theatre, blind and sight-impaired people can experience movies with rich descriptive narration. DVS Theatrical, is part of the MoPix system, and also includes a patented "Rear Window" captioning system for deaf and hard-of-hearing patrons.http://www.record-eagle.com/features/local_story_127065730.h...

Acorda Therapeutics Announces FDA Acceptance of Fampridine-SR New Drug Application for Filing

Business Wire via Yahoo! FinanceHAWTHORNE, N.Y.----Acorda Therapeutics, Inc. today announced that the U.S. Food and Drug Administration has accepted the Fampridine-SR New Drug Application for filing, assigning Priority Review and a Prescription Drug User Fee Act date of October 22, 2009.http://biz.yahoo.com/bw/090506/20090506005339.html?.v=1

Acorda Therapeutics Reports First Quarter 2009 Financial Results

Business Wire via Yahoo! FinanceHAWTHORNE, N.Y.----Acorda Therapeutics, Inc. today announced its financial results for the first quarter of 2009.http://biz.yahoo.com/bw/090506/20090506005352.html?.v=1

When a boy with a rare disease finds someone like him, distance is no obstacle

The Columbus DispatchParents of sick or disabled children seek one another out for comfort, help and knowledge.http://www.dispatch.com/live/content/local_news/stories/2009...

My Pharmiweb.com

PharmiWebAnaSpec Inc. San Jose, CA – May 1, 2009 AnaSpec has announced the release of the newest addition to its Anti-MOG ELISA assay kit series – the SensoLyteÒ Anti-Human MOG (1-125) IgG Quantitation ELISA Kit. This kit, along with previously featured SensoLyteÒ Anti-Mouse MOG (1-125) and SensoLyteÒ Anti-Rat MOG (1-125) IgG ELISA assay kits are useful for determining the amount of anti-human MOG ....http://www.pharmiweb.com/PressReleases/pressrel.asp?ROW_ID=6...

News about Myelin

AAN 2009: Oral Fingolimod Superior to Interferon Beta1-a in RRMS

Medscape NewsThis reduces the overall number of circulating lymphocytes available to mount an autoimmune reaction to the myelin sheath surrounding axons in MS. The TRANSFORMS trial is part of a program of clinical investigation with this drug in multiple sclerosis ... http://www.medscape.com/viewarticle/702487

Technologies help more enjoy movies

Traverse City Record-EaglePMD or "Pelizaeus-Merzbacher Disease" is a neurological condition that affects myelin, the insulation surrounding the nerves in the brain and spinal cord. It is marked by vision disturbances among other symptoms. Neumann said the rest of the funds ... http://www.record-eagle.com/wellbeing/local_story_127065730....

When a boy with a rare disease finds someone like him, distance is no ...

The Columbus DispatchSome are as minor as stubby eyebrows and big ears; others are severe, such as Austin's lack of myelin, the body's insulating layer for the nervous system. The 16-year-old Beechcroft High School freshman is about the size of a second-grader and weighs ... http://www.columbusdispatch.com/live/content/local_news/stor...

Acorda Therapeutics Reports First Quarter 2009 Financial Results

Phramalive.comIn laboratory studies, fampridine has been found to improve impulse conduction in nerve fibers in which the insulating layer, called myelin, has been damaged. About Acorda Therapeutics Acorda Therapeutics is a biotechnology company developing therapies ... http://www.pharmalive.com/News/Index.cfm?articleid=624364

BUYINS.NET: EGLE, CRXL, MMP, BVF, ACOR and TRW Expected To Be Lower ...

TMCnetIts preclinical programs comprise remyelination programs that include two distinct therapeutic approaches to stimulate repair of the damaged myelin sheath in MS, Glial Growth Factor 2, or GGF-2, and remyelinating antibodies; and Chondroitinase ... http://www.tmcnet.com/usubmit/-buyinsnet-egle-crxl-mmp-bvf-a...

Search results for Myelin

myelin - definition of myelin by the Free Online Dictionary, Thesaurus ...

my·e·lin (m-l n) also my·e·line (-l n, -l n) n. A white fatty material, composed chiefly of lipids and lipoproteins, that encloses certain axons and nerve fibers.http://www.thefreedictionary.com/myelin

myelin - multiple sclerosis encyclopaedia

Multiple Sclerosis Encyclopaedia - myelin ... Myelin is a collection of lipid fats and proteins that sheaths the long extensions of nerve cells (neurons) called axons.http://www.mult-sclerosis.org/myelin.html

myelin - Definition of myelin at YourDictionary.com

the white, fatty substance forming a sheath about certain nerve fibershttp://www.yourdictionary.com/myelin

MedlinePlus Medical Encyclopedia: Myelin

Definition Return to top. Myelin is an insulating layer that forms around nerves, including those in the brain and spinal cord. It is made up of protein and fatty ... http://www.nlm.nih.gov/medlineplus/ency/article/002261.htm

Myelin - All about Myelin - definitions, videos, pictures, links ...

Welcome to the Myelin page at cwanswers. cwanswers is one of the worlds largest answers community providing definitions, pictures, videos and web links for hundreds of thousands of ... http://www.cwanswers.com/8921/myelin

Wikipedia results for Myelin

Myelin - Wikipedia, the free encyclopedia

Myelin is dielectric (electrically insulating) material that forms a layer, the myelin sheath. Usually, myelin surrounds only the axon of a neuron.http://en.wikipedia.org/wiki/Myelin

Myelin protein zero - Wikipedia, the free encyclopedia

Myelin protein zero is a glycoprotein associated with Charcot-Marie-Tooth disease. Myelin protein-zero is the major structural protein of peripheral myelin.[supplied by OMIM] [1]http://en.wikipedia.org/wiki/Myelin_protein_zero

Myelin oligodendrocyte glycoprotein - Wikipedia, the free encyclopedia

Myelin Oligodendrocyte Glycoprotein (MOG) is a glycoprotein believed to be important in the process of myelinization of nerves in the central nervous system (CNS).http://en.wikipedia.org/wiki/Myelin_oligodendrocyte_glycopro...

Myelin basic protein - Wikipedia, the free encyclopedia

Myelin basic protein (MBP) is a protein believed to be important in the process of myelination of nerves in the central nervous system (CNS). MBP was initially sequenced in 1979 ... http://en.wikipedia.org/wiki/Myelin_basic_protein

The Myelin Project - Wikipedia, the free encyclopedia

The Myelin Project is an international scientific research organization aimed at accelerating clinical and translational research focused on myelin repair and to regenerate the ... http://en.wikipedia.org/wiki/The_Myelin_Project
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How the Body Works: Anatomy of a Ne...

How the Body Works: Anatomy of a NerveMore than ten thousand million nerve cells and their fibers, or axons, make up the nervous system. The axons are grouped together in nerve trunks containing sensory fibers, which...Flash - Video

Multiple Sclerosis Stem Cell Therap...

Multiple Sclerosis Stem Cell Therapy News Coveragesee www.cellmedicine.comFlash - Video

Kaleb's Random Ectopic Myelin Sheat...

Kaleb's Random Ectopic Myelin Sheath Trifibulosis HourThe first part of the random string of words/fake medical conditions is all him, and the next part is me, hahaha. Subscribe to my friend Damien Sage, a queer filmmaker who is in...Flash - Video

Myelin Repair Foundation on Stem Ce...

Myelin Repair Foundation on Stem Cell ResearchPresident Obamas lifting of federal restrictions on the use of embryonic stem cells in scientific research has generated considerable news coverage and many questions from our...Flash - Video

Answers for Myelin

Cupcake_bbyWhat purpose do neuro transmitters and myelin sheath serve?Cupcake_bbyvinay chordiaCan Multiple Sclerosis be completely cured? Can Myelin Sheath be rebuild? What are the effective remedies?vinay chordiaIt sounds like you've done some research on the subject so you probably know that, at present, there is no cure. From what I have learned as a nurse, once the myelin sheath is damaged there is no rep...Hmmm...What are the adaptive values of myelin sheaths and having giant axons?Hmmm...Both axon diameter and myelin sheaths tend to increase the speed of nerve conduction. Invertebrates generally use the method of increasing the diameter of the neurons (individual nerve cells), espe...Vanessa PWhich of the following is NOT true about the myelin sheath?Vanessa Pit is D, myelin surrounds the axons to allow the signal not to be lost. it also allows for faster conductionsarahMultiple sclerosis (MS) is a disease in which the myelin sheaths are destroyed. What process does this interfesarahSarah, I think you need to be doing your own homework. Grab your medsurg book, lecture notes, etc. and study hard. You could always form a study group if you are wanting to bounce ideas and solution...
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