The brain and spinal cord (CNS) are the "orchestrators", and our PN nerves are part of the "band". In PwMS, our "orchestrator" is messed up (lesions), so the band just does not play the song properly.
Sometimes though, just part of the band (PN) doesn't cooperate, even with a good orchestrator (CNS).
Here's a good link on the different nervous system:
http://webschoolsolutions.com/patts/systems/nervous.htm
Cherie
__________________
I am not a Neurologist, Physician, Nurse, or Hairdresser ... but I have learned that it is not such a great idea to give oneself a haircut after three margaritas
.