Are they precisely the same matter? Simply put, no. Remember that nerves are present in the PNS, and are composed of bundles of nerve fibers (axons). The neurons on the other hand are merely the cells of the nervous method. Some nerve fibers (axons) and therefore are enveloped in myelin https://www.theorthopaedicandpainpractice.com/understanding-burning-pain-in-the-upper-right-arm-causes-symptoms-and-treatment-options/