I can't find the difference between parkinson's and parkinsonism. I've looked all over on the internet and all I can possibly come up with is that parkinson's is one part of parkinsonism. Is that right?
You don't have to have Parkinson's to have Parkisonism. Parkinsonism is the movement, speech, stiffness, etc, that is typical of Parkinsons usually as a result of loss of dopamine.
Head injuries, some drugs, certain forms of dementia, all these can cause Parkinsonism - without Parkinson's.
Parkinson's is a disease of the nervous system. Symptoms include tremor's, changes in gait, stiffness, etc.
Hope it helps.