Seems it doesn't matter what hand you use, your disability may be on either side, even though about 80% of people, like euphoniaa said, are right handed. It seems to be a straight 50/50 thing, which side will get disabled.
"Try - Just A Little Bit Harder" - Janis Joplin
CCSVI procedure Albany Aug 2010
'MS' is over - if you want it
Patients sans/without patience
I am not a doctor. Do not take anything I say as medical advice.