Hey, for those who are autistic and have motor symptoms as part of their FND, this paper talks about the link between parkinsonism and autism. It's a systematic review so highest form of evidence.
ncbi.nlm.nih.gov/pmc/articl...
They found that a significant proportion of individuals with ASD demonstrated clinically apparent motor difficulties, but only a small portion of them received a specific diagnosis...as well I thought it was interesting that females with autism are at heightened risk of movement symptoms.
Parkinsons medications are less effective/not effective in severe forms of parkinsons like psp, msa and cbd. So I'm not holding out for levodopa meds but it just helps me reduce internalised stigma just knowing this and hope it helps others too.