Fatal insomnia is a rare disorder that results in trouble sleeping. The problems sleeping typically start out gradually and worsen over time. Other symptoms may include speech problems, coordination problems, and dementia. It results in death within a few months to a few years.It is a prion disease of the brain. It is usually caused by a mutation to the gene encoding protein PrPC. It has two forms: fatal familial insomnia (FFI), which is autosomal dominant and sporadic fatal insomnia (sFI) which ...
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