What is Parkinson's disease?
Parkinson disease (Parkinson's disease, PD) is a progressive neurodegenerative disorder associated with a loss of dopaminergic nigrostriatal neurons. It is named after James Parkinson, the English physician who described the shaking palsy in 1817.
Parkinson disease is recognized as one of the most common neurological disorders, affecting approximately 1% of individuals older than 60 years. Cardinal features include resting tremor, rigidity, bradykinesia, and postural instability.