I actually shadowed the neurologist (from this entry) yesterday and discovered that the patient with Guillain-Barre actually had something called arachnoiditis. Arachnoiditis is a viral infection of the very bottom of your spinal cord (called the conus medullaris). Since it is a viral infection, there are no antibiotics to help the patient improve. However, after running a few tests, it looks like the patient's immune system is doing what it should and he is on the road to recovery. The human body is an amazing thing.