SAMe (S-adenosylmethionine) is the body's primary methyl donor. It methylates neurotransmitters, neurohormones (such as melatonin), proteins, membrane phospholipids (which form the cell membrane), the myelin sheath around the nerves and creatine (used in energy transfer).
So both of these conditions effect the myelin sheath around the nerves. I became paralyzed from the neck down and was in extreme pain. Their diagnoses was entirely based on symptoms.
It really wasn't their diagnoses at all as my girlfriend suggested it to a nurse who Googled it and passed it along to the doctor. They first thought I was a drunkard as I stumbled during admission, when they ruled this out they decided stroke but the MRI couldn't find anything.