Spinocerebellar ataxia type 1 is an autosomal dominant neurodegenerative disease which is characterised by:
- variable degrees of motor weakness
The onset of symptoms occurs in the third or fourth decades. The prognosis is bleak, with a gradual progression to disability and death within 10-20 years.
Ref: Orr, H.T. et al. (1993). Expansion of an unstable CAG trinucleotide repeat in spinocerebellar ataxia type I. Nature Genet. 4, 221-26.