Currently incurable, this disease is one of the most common inherited neurological disorders affecting approximately 1 in 2,500 people equating to approximately 23,000 people in the United Kingdom and 125,000 people in the United States.
Trenutačno neizlječiva, ova je bolest jedna od naučestalijih nasljednih neuroloških bolesti koja zahvaća približno 1 od 2500 ljudi što je jednako otprilike 23 000 oboljelih u Ujedinjenom Kraljevstvu i 125 000 oboljelih u SAD-u.