I have theorized that PD is related to many other neurological issues all having some of the same root causes that manifest in different ways and can lead to or coexist with PD.
So far my theory is looking to have some validity. I find this to be relevant because I also theorize that if I can determine what these diseases all have in common, I will be getting closer to understanding the root cause of PD.
Below are links to a some of what I have read so far. ADHD, autism, high IQ (gifted spectrum) and schizophrenia are all associated with greater risk for PD. The PD process has similarities and links to Fibromyalgia. OCD manifests due to a process that also occurs in PD. I theorize then that OCD behaviors are higher amongst prodromal PD populations.
Although I have yet to find anything substantiating this, I theorize that Auditory Processing disorder and Sensory Processing disorder are more prevalent in prodromal PD populations.
Personally, I have OCD, sensory processing issues, autistic traits & was labeled as “gifted” as a child.
OCD: I have hyper self discipline when I decide something is important, hyper sensitivity to immorality or what I perceive as immorality, etc etc.
Sensory & auditory processing: I also have sensory and auditory processing disorder meaning I get overwhelmed and hate very stimulating environments like concerts. (But I love intellectually rigorous opportunities, not sure if that’s related)
Autism: I have traits associated with autism but can “fake it” as far as being social but I find sarcasm to be deeply unpleasant and unkind. I think this is OCD coexisting with a little autism.
High IQ/ intellectually gifted: does not necessarily equate to academic or professional success as it’s a different but not necessarily better way of processing information. As a child I was “tested” for giftedness and labeled as such. My kids are “gifted” too. (It’s not something to boast about, being “gifted” can make life more challenging.)
I’m sharing all this in hopes others will self reflect and share if they have had any of the aforementioned neurological traits preceding or coexisting with PD.
I wish someone like Mischley would culminate info on this as it can help with identifying bio markers and help with deciphering root causes.
EDIT: This is not an article. It is just my research notes. Articles, are in links below, in my comments.