Peripheral Neuropathy

Telephone lines rotting from the ends

Imagine a telephone line running three miles from the central office to your house. The copper wire inside (the axon) carries the signal, wrapped in rubber insulation (myelin) that speeds the message up. Tiny power plants along the line (blood vessels) keep the wire fed with electricity (glucose and oxygen). When diabetes damages those power plants, or when you pour acid on the insulation (alcohol), or when someone rips off sections of rubber (immune attack in GBS), the system fails — but the farthest end of the line (your toes, three feet away) fails first because it depends entirely on those power plants and has the least insulation left when damage spreads backward. The signal slows to a crawl, then stops. Your house (your brain) loses contact with the distant endpoint (your foot) and cannot feel what is touching it or command it to move. The longer the line, the sooner it dies.