The Displacement Framework Applied to Parkinson's Disease: Dopaminergic Ground State Depletion, the 70–80% Threshold, and Motor Attractor Collapse

We apply the Displacement Framework to Parkinson's disease (PD), treating the dopaminergic system as a ground state S° whose depletion defines a displacement trajectory. The 70–80% threshold before motor symptom onset is recast as an attractor basin boundary: below this dopamine reserve, the motor system can no longer maintain S° and collapses into a wrong attractor (tremor, rigidity, bradykinesia).

Return paths include dopamine restoration (L-DOPA), deep brain stimulation as artificial basin reshaping, and neuroprotective strategies that slow the depletion trajectory.