How do you exactly prevent progressive supranuclear palsy?

You cannot: Psp is progressive supranuclear palsy in the group of parkinsonism plus=no response to treatment with Dopamine it is thought to be genetic and cause degeneration and changes in the neurotransmiters in basal ganglia and other locations in brain--less understood compare to parkinson disease.

Do not know: Although seemingly related to parkinson's disease, and categorized as a "movement disorder", there does not seem to be a lot of information on risk factors or any techniques to prevent or even fully mitigate once it starts. It is incurable and progressive, and a nasty problem.