<qa>  What is the most common neurologic disorder that is not PD?3. Presence of clinical signs consistent with a neurologic disorder other than PD including, but not limited to, progressive supranuclear palsy, multiple system atrophy Shy-Drager syndrome, olivopontocerebellar degeneration, striatonigral degeneration, corticobasal degeneration, Picks disease, diffuse Lewy body disease, dementia, schizophrenia, psychosis, or hallucinations. 