Hereditary disorders causing ataxia include autosomal dominant ones such as spinocerebellar ataxia, episodic ataxia, and dentatorubropallidoluysian atrophy, as well as autosomal recessive disorders such as Friedreich's ataxia ( sensory and cerebellar, with the former predominating ) and Niemann Pick disease, ataxia-telangiectasia ( sensory and cerebellar, with the latter predominating ), and abetalipoproteinaemia.