Alright as a quick recap, spinocerebellar ataxia is a group of progressive neurodegenerative diseases of genetic origin.

得！快速回顾一下～脊髓小脑性共济失调是一组遗传性进行性神经退行性疾病。

In fact, many different gene mutations have been identified each of which is known to cause different types of spinocerebellar ataxia.

实际上，目前已经鉴定出不同的基因突变；每种突变都会导致不同类型的脊髓小脑性共济失调。