Are they the same matter? To put it simply, no. Remember that nerves are present in the PNS, and so are made up of bundles of nerve fibers (axons). The neurons Alternatively are merely the cells in the anxious system. Some nerve fibers (axons) and so are enveloped in myelin https://www.theorthopaedicandpainpractice.com/understanding-burning-pain-in-the-upper-right-arm-causes-symptoms-and-treatment-options/