Parkinson's Disease: Causes, Risk Factors, and Current Understanding
Parkinson's results from dopamine-producing neuron loss in the substantia nigra. Exact cause is unknown; contributing factors include:
- Genetics: Rare familial forms; most cases sporadic with polygenic risk.
- Environmental toxins: Pesticides, herbicides, heavy metals linked to higher risk.
- Age: Incidence rises sharply after 60.
- Other: Head trauma, neuroinflammation, oxidative stress.
Ongoing research aims to clarify mechanisms for better prevention and disease-modifying therapies.
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