Final answer:
Early-Onset Parkinson's disease is a form of Parkinson's disease that occurs before age 50 and presents the same symptoms as Parkinson's disease.
Step-by-step explanation:
Early-Onset Parkinson's disease is a form of Parkinson's disease that occurs before the age of 50. It is characterized by the same symptoms as Parkinson's disease, including tremors, slowed movement, and difficulty with walking. The main difference is the age at which the disease presents itself.
In Parkinson's disease, the loss of dopamine neurons in the substantia nigra causes these symptoms. The exact cause of Parkinson's disease is unknown, but it is believed to involve a combination of genetic and environmental factors.