myeline

Definitions

  • WordNet 3.6
    • n myeline a white fatty substance that forms a medullary sheath around the axis cylinder of some nerve fibers
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Webster's Revised Unabridged Dictionary
    • n myeline (Physiol. Chem) A soft white substance constituting the medullary sheaths of nerve fibers, and composed mainly of cholesterin, lecithin, cerebrin, protein, and some fat.
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Etymology

Webster's Revised Unabridged Dictionary
Gr. myelo`s marrow

Usage

In literature:

In the human brain they are myelinate before birth.
"Encyclopaedia Britannica, 11th Edition, Volume 4, Slice 4" by Various
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In news:

Above, injected cells add myelin to brain cells.
Multiple sclerosis (MS) is a chronic autoimmune disease in which a body's immune cells mistakenly attack myelin — a protective sheath around nerve cells in the brain and spinal cord.
Direct Determination of the Lamellar Structure of Peripheral Nerve Myelin at Moderate Resolution (7Å).
Researchers Figure Out that Too Much Lamin Leads to Myelin Failure.
Myelin Repair Foundation's Institutional InnovationBusinessweek.
Scientists from the University of Wisconsin report that they have successfully generated oligodendrocytes from human embryonic stem (ES) cells that can make myelin.
Typically during MS, the immune cells destroy myelin, a protective sheath surrounding nerves , and eventually leading to nerve damage.
Myelin provides the pathways along which some nerve cells regenerate after an injury.
provides evidence that alterations in myelin can cause defects in neurons and the central nervous system in general that are r...
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In science:

The implicit and explicit implementations demonstrated similar characteristics in detecting the myelin signal in both the simulated and experimental T2 decays, providing additional evidence to support the close link between the two tests.
A robust and reliable method for detecting signals of interest in multiexponential decays
The regularized form of NNLS it is widely used in the detection and measurements of the myelin signal (4, 13, 7).
A robust and reliable method for detecting signals of interest in multiexponential decays
However, care must be taken to reliably detect the smaller myelin signal.
A robust and reliable method for detecting signals of interest in multiexponential decays
The reconstructed spectrum must have sufficient resolution so that the myelin signal does not substantially overlap with the signal from the main water peak.
A robust and reliable method for detecting signals of interest in multiexponential decays
In addition, the noise is higher than the amplitude of any expected myelin signal.
A robust and reliable method for detecting signals of interest in multiexponential decays
It is clear from the G=10 reconstruction there is little or no myelin signal at 20ms.
A robust and reliable method for detecting signals of interest in multiexponential decays
The reconstructions are much too noisy to say whether the T2 decay is consistent with a myelin signal or not.
A robust and reliable method for detecting signals of interest in multiexponential decays
Thus the 32 echo and 48 echo yield similar rejections of the null hypothesis and both confirm the existence of a signal with a time constant below 40ms, which is believed to be due to myelin.
A robust and reliable method for detecting signals of interest in multiexponential decays
The standard deviation of the STCS indicates a highly reproducible myelin signal detection for the third version but no detection for the second version of the regularized NNLS.
A robust and reliable method for detecting signals of interest in multiexponential decays
Another answer would be to point out this is only one example of an original spectrum that yields a false positive myelin signal.
A robust and reliable method for detecting signals of interest in multiexponential decays
An argument that is often put forward in support of claims of the reliability of current practices is that the reduction in the reported myelin signal correlated with advanced pathology in postmortem formalin-fix brain (8, 21).
A robust and reliable method for detecting signals of interest in multiexponential decays
Strong evidence has been presented for the correlation between the reduction in the myelin signal as determined with NNLS and increased pathology. However, as is well known, the increased pathology also has a major impact on the main water peak.
A robust and reliable method for detecting signals of interest in multiexponential decays
As demonstrated in this paper, when reconstructing with NNLS, the shape of the main water peak can heavily influence the measured myelin signal.
A robust and reliable method for detecting signals of interest in multiexponential decays
Thus, the reported correlation between reduced myelin signal and advanced pathology could actually be detecting the well known correlation between advanced pathology and the main water peak.
A robust and reliable method for detecting signals of interest in multiexponential decays
The explicit tests of the null hypothesis for the myelin detection problem clearly demonstrated the simplicity with which the test can be applied.
A robust and reliable method for detecting signals of interest in multiexponential decays
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