4 doctors weighed in:
Prior to the first evidence, or symptoms of Parkinson's disease, how long has the disease been around?
4 doctors weighed in

Dr. Edward Smith
Neurology
1 doctor agrees
In brief: A long while
Parkinsonian movement disorder symptoms generally develop only after about 90% of the neurons in the substantia nigra (a potion of the midbrain).
This may require decades to occur. Research imaging techniques can measure the dopamingeric neurons in the brainstem to monitor progress of neuronal loss.

In brief: A long while
Parkinsonian movement disorder symptoms generally develop only after about 90% of the neurons in the substantia nigra (a potion of the midbrain).
This may require decades to occur. Research imaging techniques can measure the dopamingeric neurons in the brainstem to monitor progress of neuronal loss.
Dr. Edward Smith
Dr. Edward Smith
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Dr. Stephen Daquino
Sports Medicine
1 doctor agrees
In brief: Could be years
The first signs of parkinson's disease can be very subtle and non specific.
Memory changes, balance or gait issues, fatigue. They could easily be overlooked or blamed on another process or fleeting illness. The diagnosis is a clinical one with no definitive test to make a diagnosis. Most cases have been around for months to years before a formal diagnosis is made.

In brief: Could be years
The first signs of parkinson's disease can be very subtle and non specific.
Memory changes, balance or gait issues, fatigue. They could easily be overlooked or blamed on another process or fleeting illness. The diagnosis is a clinical one with no definitive test to make a diagnosis. Most cases have been around for months to years before a formal diagnosis is made.
Dr. Stephen Daquino
Dr. Stephen Daquino
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