The symptom is "the straw that broke the camel's back" not the beginning of the disease as such...
Imagine two people reacting to the same traumatic event. One experiences it from an intense fear due to its configuration and the other experiences it in a less intense way. The body of each of them generates totally different chemicals to defend against a supposed threat.
Apparently the event is the same for both of them and their external reaction is almost identical, but internally one of them is experiencing a stress process in a critical way that their body is storing (the illness began when the first response was triggered from a deep-rooted fear in the transgenerational).
It turns out that this sensitive person has a "restless leg" tic but she doesn't care. She does not know that this symptom would be informing her of a dysfunction in the intensity of her fears, a characteristic that has been granted to her through automatic assignment of some reparation for tragedies experienced helplessly by her ancestors.
Later, what medicine classifies as "the beginning of the disease" will be unleashed, a process of degradation that appears to be irreversible but its "slowness" provides the ideal time to undo each of the traumatic processes experienced in the ignorance of the unknown why I am experiencing the events with a more intense fear than that of others.
Parkinson's is an inherited dysfunction that repairs the impotence already experienced by ancestors of our family tree. It is not a neurodegenerative disease, it is a window to regeneration and recognition of those events that were stored in that collective family unconscious as a pure need to dissolve that suffering. It is therefore an "opportunity" and not a naive label of "incurable disease."
Science continues to try to solve mysteries about the biochemistry of PD and ignores its holistic origin because it does not know the mechanics of this operating hypothesis. If the original cause is emotional and transgenerational, like many of the diseases that occur in this era, we should grant a mention, even if it is pseudoscientific, with all humility and focus the studies on that possibility.
Why not create a Holistic trial of family constellators following Bert Hellinger's techniques, working simultaneously from different countries to observe the evolution of symptoms in volunteers with PD?
The process would detect the origin event that gave rise to the disorder in each patient and could be a key factor in reducing the intensity of fear and with it the unconscious recognition that the dopamine production system can now be restored because the possibility of living another traumatic event like the one that took place has already disappeared.