What if Parkinson,s is your brain's attempt to shut down harmful stimuli?
Example : A boxer in the ring is deep into the conscious thought of moving, bobbing, footwork, throwing jabs or hooks. All while taking a beating. The brain says to itself that this is self destructive behavior and starts shutting down those links. Instead of avoiding those activities we continue in them creating new pathways which the body shuts down again.
Similar to an extreme food allergy.