I've always wondered about the PD diagnosis because I don't respond to Sinemet. So what else might be involved? For the past 30 years my hobby has been restoring 1960s-era VWs. Which involved a lot of welding using my cheap flux wire mig welder. And never using a mask. Some of the early signs such as handwriting problems and forgetting common words started a few years ago when I was spending all my free time doing a full-body restoration of a 1967 VW. It involved a lot of welding. At the time I joked the bug has more weld metal than original metal. This is from a report on manganese-induced parkinsonism:
"Mn toxicity is characterized by motor and sensory disturbances, as well as neuropsychiatric and cognitive deficits [92,93]. The motor impairments include hypertonia with cogwheel rigidity, bradykinesia, “cock-gait”, rapid postural tremor, and tendency to fall when walking backwards....Mn-induced parkinsonism is distinguishable from PD by the absence of Lewy bodies (another hallmark of PD) [19], the lack of therapeutic response to levodopa (a drug used to treat early stages of PD), failure to detect fluorodopa uptake by positron emission tomography (PET) studies, more frequent dystonia, and less resting tremor"
I know it's a long-shot but what is “cock-gait”, rapid postural tremor? I see the neurologist next month and will definitely ask about this.
kpo