<unk>  <unk>  is the degeneration of neurons in specific areas of the brain – the cerebellum, pons, and inferior olivary nucleus.<unk>  is present in several neurodegenerative syndromes, including inherited and non-inherited forms of ataxia (such as the hereditary spinocerebellar ataxia known as Machado–Joseph disease) and multiple system atrophy (MSA), with which it is primarily associated.<unk>  may also be found in the brains of individuals with prion disorders and inherited metabolic diseases. The characteristic areas of brain damage that indicate<unk>  can be seen by imaging the brain using CT scans or MRI studies. The term was originally coined by Joseph Jules Dejerine and André Thomas.
Olivopontocerebellar atrophy
Cerebellar abiotrophy
Cerebellar hypoplasia
Pontocerebellar hypoplasia
Coprolalia
Cerebellar agenesis
Dentatorubral–pallidoluysian atrophy
Harding ataxia