A soft white substance constituting the medullary sheaths of nerve fibers, and composed mainly of cholesterin, lecithin, cerebrin, protein, and some fat.
One of a group of phosphorized principles occurring in nerve tissue, both in the brain and nerve fibers.
The whitish, fatty substance forming the segmented, multilayered wrappings or "sheaths" around certain long nerve fibers or axons. Myelin sheaths electrically insulate axons, serving to speed the transmission of nerve signals (action potentials).
The fat-like substance which surrounds the axon of nerve fibers and forms an insulating material.
Tissue that wraps around many of the nerve fibers. It is composed of fatty material and functions as an insulator.
the insulation that surrounds the nerve fibers and is damaged in MS.
multilayered plasma membrane sheath that insulates nerve fibers.
(my´ a lin) • A material forming a sheath around some axons. It is formed by Schwann cells that wrap themselves about the axon. It serves to insulate the axon electrically and to increase the rate of transmission of a nervous impulse.
Fatty material that surrounds and insulates axons of most neurons.
the sheathing that insulates axons and facilitates speedy communication among neurons.
a material which forms the sheath around the axons of certain nerve cells. These axons conduct electrical impulses faster than those without a myelin sheath.
a white fatty substance that forms a sheath around certain neurons and provides insulation necessary for proper neural transmission.
The fatty tissue covering the axons of the nerves that allows efficient conduction of impulses. Myelin is produced by oligodendrocytes in the CNS and by Schwann cells in the peripheral nervous system.
fatty material, composed of lipid and protein, that forms a protective sheath around nerve fibres.
A complex fatlike substance forming a sheath around the axons of certain nerves. Composed of lipids and protein. Allows nerves to conduct rapidly and efficiently.
Myelin is a lipid-rich substance that serves to insulate axons and speed up conduction. In the PNS, it's made by schwan cells while in the CNS, it's made by oligodendrocytes.
Fatty substance forming the outer tunic (myelin sheath) around many nerve axons; facilitates the conduction of nerve impulses along the axons.
The fat-like substance that insulates certain nerve fibres.
A discontinuous fatty insulating sheath formed around the axons of certain neurons, which facilitates fast nerve conduction. It is produced by Schwann cells in the peripheral nervous system and oligodendrocytes in the central nervous system, which wrap their cell processes around the axon, forming a sheath of layers of membrane.
An insulating sheath around an axon; consists of multiple layers of neuroglial membrane; significantly increases conduction rate along the axon.
a fatlike substance forming a sheath around the axons, or nerve fibers, of certain nerves.
a white fatty substance that forms a medullary sheath around the axis cylinder of some nerve fibers
a fatty substance that coats and insulates nerve cells.
a covering around the axons of the neurons that facilitates transmission of nerve impulses.
The fatty, porcelain-colored insulation around an axon that reduces its energy consumption while also making the impulse travel much faster. It is wrapped in layers, like a bandage.
Fatty substance which forms a sheath around some nerve fibers in the CNS and the peripheral nervous system. Myelin is formed by Oligodendeocyte cells and consists largely of their cell membranes, which wrap themselves around the nerve axons. - The fatty insulation of nerve fibers that is damaged in multiple sclerosis. Myelin covers and insulates the body's nerves in the brain in what is called the myelin sheath.
Greek myelos = marrow; hence, white fatty sheath of an axis cylinder; adjective - myelinated.
A soft, white coating of nerve fibers in the central nervous system, composed of lipids (fats) and protein. Myelin serves as insulation and as an aid to efficient nerve fiber conduction. When myelin is damaged in MS, nerve fiber conduction is faulty or absent. Impaired bodily functions or altered sensations associated with those demyelinated nerve fibers are identified as symptoms of MS in various parts of the body.
a substance which insulates nerves and allows for more efficient transmission of electrical signals
A protein that covers and acts as an electrical insulator for nerve fibers
A lipid material secreted in layers around axons by Schwann cells in the PNS and oligodendroglia in the CNS. This wrapping insulates electrically the axon from the surrounding extracellular environment, resulting in saltatory conduction between Nodes of Ranvier. This in turn increases axonal conduction velocity.
A collection of proteins and lipids that make up the myelin sheath; speeds transmission of signals along nerve fibres.
White matter surrounding axons that acts as an insulation. It helps speed up the transmission of the electro-chemical impulses that are vital for every movement, or lack of, in the human body.
The protective coating that surrounds nerve fibers. It's made out a layer of proteins packed between two layers of lipids (fats).
Schwann cells (PNS) or oligodendroglia (CNS) that form a high-resistance sheath around the axon of a neuron. See Glial Cells.
a fat-like substance that forms a protective sheath around nerve fibers
The white substance of Schwann, the medullary sheath.
A fatty substance which covers nerves, assisting in the passage of messages along the nerves between the brain and every part of the body.
Insulating material that surrounds nerves and allows the quick conduction of nerve impulses. search for Myelin
Myelin, sometimes referred to as "white matter" because of its white, fatty appearance, protects and insulates the axons. It consists of a protective sheath of many different molecules that include both lipids (fatty molecules) and proteins. This protective sheath acts in a manner very similar to that of the protective insulation that surrounds an electric wire; that is, it is necessary for the rapid transmission of electrical signals between neurons. It does this primarily by containing the electrical molecules (called ions) within the axon so that they are properly transmitted to the next neuron.
A substance made of protein and lipid (fat) that protects the nerves, especially in the brain. The myelin sheath is a jacket of insulation around axons to help them conduct their electrical discharges quickly down the axon.
White fatty substance that coats the axons of most neurons. It speeds transmission of messages.
the insulation that surrounds the axons and is damaged in MS. Areas of the CNS where there are large amounts of myelin are known as white matter because they look paler than surrounding areas.
A fatty substance, produced by cells in the central nervous system known as oligodendrocytes. Myelin forms a protective sleeve around axons that enables them to conduct electrical impulses.
a fatty covering that insulates nerve cell fibers in the brain and spinal cord, myelin facilitates the smooth, high-speed transmission of electrochemical messages between these components of the central nervous system and the rest of the body. In MS, myelin is damaged through a process known as demyelination, which results in distorted or blocked signals.
The outer lipid rich (fatty) layer that covers nerves and nervous system pathways in the brain and spinal cord.
The fatty insulating covering that surrounds neurons. This covering is essential for rapid transmission of nerve signals. Produced from oligodendrocytes and Schwann cells.
A white, fatty insulating material for axons which produced in the peripheral nervous system by Schwann cells, and in the central nervous system by oligodendrocytes. Myelin is necessary for rapid signal transmission along nerve fibers, ten to one hundred times faster than in bare fibers lacking its insulation properties. Loss of myelin accompanies many central nervous system injuries and is the principal cause of multiple sclerosis. The process of remyelination is very important in spinal cord injury research. If this is possible in the body, as many researchers believe, it may be possible to return function to intact nerve fibers. Oligodendrocytes are apparently unable to provide myelin in the mature central nervous system.
The protective protein sheath that insulates the nerve cells and helps speed the conduction of nerve signals to the brain and spinal cord
A covering made of fats and proteins that surrounds nerve cells. It protects nerves and helps them work better.
The fatty protein coat around nerve fibres. Myelin sheaths increase the speed at which electrical impulses or messages travel.
(adj.) fatty material enclosing the nerve fiber
Compact fatty material that surrounds and insulates axons of some neurons.
a fatty substance that covers and protects the nerves.
(MY-eh-lin) A fatty covering that forms a protective sheath around nerve fibers and dramatically speeds the transmission of nerve signals.
A white, fatty insulating material for axons which produced in the peripheral nervous system by Schwann cells, and in the central nervous system by oligodendrocytes. Myelin is necessary for rapid signal transmission along nerve fibers, ten to one hundred times faster than in bare fibers lacking its insulation properties. It insulates axons giving the "white matter" of the central nervous system its characteristic color.
The many-layered sheath composed mainly of fats and protein, which are wrapped around nerve fibres. They insulate the fibres from one another and aid conduction. Myelin is damaged in MS thus interfering with nerve impulse.
The insulation surrounding a brain cell's axon.
a white fatty substance that forms sheaths around certain axons and increases the speed of neural impulses. (71)
a structure of cell membranes that forms a sheath around axons, insulating them and speeding conduction of nerve impulses.
Children with autism, Trevarthen et al A fat-like substance wrapped around nerve fibres, acting as an insulator and assisting the rapid transmission of nerve impulses.
Fatty material enveloping the majority of nerve cells
A layer composed of protein and lipid that surrounds most nerves. The myelin sheath speeds the transmission of impulses along nerves.
The fatty substance that covers and protects nerves.
A fatty insulating material that surrounds the axon.
The insulating sheath that surrounds axons.
The fatty substance that covers myelinated nerves. Myelin is a layered tissue surrounding the axons or nerve fibers. This sheath acts as a conduit in an electrical system, allowing rapid and efficient transmission of nerve impulses. Myelination refers to the process in which nerves acquire a myelin sheath.
A butter-like insulation [greasy coating] around the nerves [axons]. Myelin enables nerves to quickly conduct electrical impulses from one brain area to another. Without myelin, the nerves work sluggishly and inefficiently.
A fatty substance that coats the outside of axons (myelin sheath), structures of healthy nerve cells.
A substance that sheathes nerve cells, acting as an electric insulator that facilitates the conduction of nerve impulses.
The insulating sheath around axons, formed by certain types of glial cells.
whitish substance surrounding nerve fibres, involved in the transmission of nerve influxes.
Fatty substance which acts as an insulator around most of the nerve fibers in the human body. Cholesterol is main ingredient. Found in the central as well as the peripheral nervous system.
a fatty substance serving as an insulator for nerve fibres
the lipid substance forming a sheath around the axons of certain nerve fibers.
A sheath of fatty tissue that covers most axons on the nervous system. It serves to speed conduction my limiting true action potentials to the gaps in the sheath. Under the myelin the neural impulse moves at the speed of light. The layer is formed by Schwann Cells in the periphereral nervous system and Oligodendrocytes in the central nervous system.
a substance that sheaths and insulates nerve fibers in the brain and spinal cord
Related Topic"A substance made of protein and lipid (fat) that protects the nerves, especially in the brain..."
Fatty sheeth surrounding nerve cell processes
a fatty substance that covers axons.
The fatty sheath coating the axons of the nerves; it allows for the efficient conduction of nerve impulses.
Sheath of fatty cells that insulates and speeds neural impulses by about tenfold.
Layers of lipid cell membrane formed by Schwann cells that wrap themselves around axons; effectively electrically insulate the axon. A similar lining is produced by oligodendrocytes in the central nervous system.
Fatty sheath which encloses certain nerve fibres in the central nervous system.
Myelin is an electrically insulating phospholipid layer that surrounds the axons of many neurons. It is an outgrowth of glial cells: Schwann cells supply the myelin for peripheral neurons while 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.http://www.pbrc.hawaii.edu/~danh/InvertebrateMyelin/ Myelin was discovered in 1878 by Louis-Antoine Ranvier.