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.
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.
Peripheral neuropathy is a medical disorder in which the nerve fibers of peripheral nervous system are affected. Peripheral nerves are normally concerned with carrying signals and sensations to and from the brain and spinal cord to the entire body.
Fibromyalgia Is Correlated with Retinal Nerve Fiber Layer Thinning. - PubMed - NCBI