Parkinson’s disease (PD) is one of the most common neurodegenerative diseases of the elderly. Neurodegenerative diseases are a heterogeneous collection of brain disorders where a particular group of neurons dies prematurely. The group traditionally includes dementias (such as Alzheimer’s), Parkinson’s, ALS or Lou Gehrig’s disease, cerebellar degeneration, Huntington’s disease, and prion diseases such as Creutzfeldt-Jacob and its variants. These diseases have some features in common and all ultimately lead to death, but their time course and therapy vary widely….
