Avansul în ştiinţa medicală şi nivelul de trai din ţările dezvoltate au creat premisele creşterii speranţei de viaţă, iar numărul persoanelor afectate de bolile neurodegenerative a crescut şi el.
Advances in medical science and the standard of living in developed countries have created conditions resulting in an increase in life expectancy, but the number of people affected by neurodegenerative disease has also risen.