World Parkinson’s Day 2025: Experts explain symptoms, causes and treatments

Parkinson’s disease (PD) impacts movement, and while it mostly affects individuals over 60, early-onset cases can occur, too. Parkinson’s disease is caused by the loss of dopamine-producing neurones in a specific area of the brain called the substantia nigra. So, dopamine is a chemical messenger that helps control movement and coordination. When dopamine levels drop, it leads to symptoms that affect the body’s ability to move smoothly and efficiently.

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