When a person has MS (multiple sclerosis), the myelin sheath of the Schwann cells is degraded on the axon sheath. Sometimes, the myelin sheath is completely missing.
Thus, here is "Ms. MS, the neuron with Multiple Sclerosis".
The cell itself is the round part with the star like appendages. The long appendage is it's axon, where the Schwann cells and myelin sheath are located. The fringes are dendrites (at the top) that receive information and the axon terminals (at the bottom) that give off information. The bulbs on the axon are the Schwann cells wrapped in myelin. Notice that, from the top, the second and third are the big balls; they are the normal ones. The others are smaller, thus degraded, and are the MS cells.
This was fun to make. If you are interested in the pattern, I will post it.