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BE_Myelinated nerves. A section through myelinated nerve fibers and Schwann cells. Myelin (green) is an insulating fatty layer that surrounds the nerve fibre (axon, black), increasing the speed at which nerve impulses travel.
A cross section of a bundle of nerve fibers. Axons (orange) are wrapped in myelin (purple); an extension of the membrane of glial cells. Myelin has high lipid content, and acts to insulate the axons, causing them to transmit nerve impulses much faster.
Biomedical illustration of an oligodendrocyte repairing damaged myelin sheaths of a motor neuron. Such damage exposes nerve fibers and disrupts the ability of the nerve to carry messages. It is associated with diseases such as diabetes and multiple sclerosis.
Neurons: Myelin sheaths, a covering over some of your brain's neurons, helps to speed information being passed. Multiple Sclerosis (MS) is a disease that affects this coating and causes serious problems for those who have it.
Neurons are the brain’s rock stars. But without the glial cells — astrocytes, microglia and oligodendrocytes — there would be no show at all. A diagram by Arne Hurty for Stanford Medicine Magazine Fall