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The idea of diminished blood flow having an impact on brain function is known, when the carotid arteries become clogged, strokes and "mini-strokes" occur, which cqn affect any part of the brain. Following this logic, maybe Parkinson's is a specialized type of stroke symptom? Maybe the blood/brain barrier is compromised due to lack of blood flow to the brain, and does not allow dopamine in the body to get to the brain where it is needed? I have read that there may be dopamine naturally occurring in other parts of the body than the brain. I hope they are getting close to a cure for Parkinson's! [log in to unmask]