What is the typical age of onset for Parkinson's disease?

The typical age of onset for Parkinson's disease is indeed around 45-65 years old. This age range is significant because it aligns with the common demographic that healthcare professionals observe in clinical settings. Most cases of Parkinson's disease are diagnosed in middle to late adulthood, making this age range the most representative of those affected by the condition.

Parkinson's disease is a neurodegenerative disorder that primarily affects movement and is associated with the loss of dopamine-producing neurons in the brain. As individuals age, the risk for various neurodegenerative diseases, including Parkinson's, generally increases, thus explaining why this age range is identified as the typical onset period.

The age groups listed in the other options often do not reflect the epidemiological data surrounding Parkinson's disease, as the earlier ages do not commonly see significant prevalence of the condition, while those older than 65 may represent later stages or advanced cases rather than the average onset age.