jmeyer -- if your neurologist was not a Movement Disorder Specialist -- then find one and make an appointment asap. This is a neurologist who specializes in Parkinson's and Parkinson's-like illnesses. They are the best around.
for my initial diagnosis - the neurologist did the same thing - an mri to see if I had a brain tumor - when I did not - then the PD diagnosis.
But I switched to an MDS - she knows her stuff. It's best to see an expert.
Sorry to hear your wife joined the club no one wants to join....
Good luck.