Noun
A soft white substance constituting the medullary sheats of nerve fibers, and composed mainly of cholesterin, lecithin, cerebrin, albumin, and some fat.
One of a group of phosphorized principles occurring in nerve tissue, both in the brain and nerve fibers.
Source: Webster's dictionaryMyelin is a fatty substance that coats the axons, speeding up synaptic transmission. Myelanation... is generally completed by age twenty. Multiple sclerosis is one of several degenerative diseases that can affect the myelin sheath... Daniel Levitin
Because the A-delta fiber is thicker than the C fiber, and is thinly sheathed in an electrically insulating material ( myelin ), it carries its signal faster (5–30 m/s ) than the unmyelinated C fiber (0.5–2 m/s). Source: Internet
Cajal challenged this view after staining areas of the brain that had less myelin and discovering that neurons were discrete cells. Source: Internet
Cross section of a myelinated axon 1. Axon 2. Nucleus of Schwann Cell 3. Schwann Cell 4. Myelin Sheath 5. Neurilemma The main purpose of a myelin layer (or sheath) is to increase the speed at which impulses propagate along the myelinated fiber. Source: Internet
Both act to add myelin sheaths to the axons, which acts as a form of insulation allowing for better and faster proliferation of electrical signals along the nerves. Source: Internet
‘Central pontine’ indicated the site of the lesion and ‘myelinolysis’ was used to emphasise that myelin was affected preferentially compared to the other neuronal elements. Source: Internet