Multiple sclerosis (MS) and
Guillain-Barré syndrome (GBS) are diseases of the nervous system. They’re not the same, but they do have a lot of similarities. Both
MS and GBS are
autoimmune diseases. This means they cause your body's
immune system to attack its own tissues. They both start when the
immune system attacks and damages something called
myelin. That’s a layer of insulation that surrounds nerves. It also helps nerves transmit their messages.
Each condition affects a different part of your nervous system:
MS damages the central nervous system. That’s the
brain and spinal cord.
GBS damages the peripheral nervous system. That’s the nerves outside the
brain and spinal cord.