Deb,
There is also Parkinson's....what were your friend's symptoms, perhaps we can then figure out the name. (that is if it isn't Parson's Down) I haven't heard of that either.
Dear Deb:
I am sorry but I am not aware of a neurological disorder named Parson's Down syndrome. There is a Parsonage-Turner syndrome, Down Syndrome, but no Parson's Down syndrome in my memory bank.
Sorry,
CCF Neuro MD