Strength of the magnetic field as a function of distance from the center of an axon. At myelinated segments, the magnetic field reaches its maximum of 3.0 × 10−12 T at axolemma, the outer membrane of the axon, then falls off to 2.3 × 10−12 T once it reaches neurilemma, the outer layer around the myelin sheath. From neurilemma, it keeps its homogeneity for distance of 2.066 μm and then it starts to decay. On the other hand, at nodes of Ranvier, the magnetic field stays homogeneous up to distances of 6.066 μm away from axolemma. After this the field starts decaying non-uniformly with distance.